CCLME.ORG - DIVISION 1. DEPARTMENT OF INDUSTRIAL RELATIONS CHAPTERS 1 through 6

(continued)
(e) (19-120) At least once every three months, every hoisting rope used for hoisting or lowering men shall be carefully inspected by a competent man designated for that purpose:
Such inspection shall consist of:
(1) Carefully examining the exterior of the rope throughout its entire length.
(2) Cutting off a section from the load end of the rope at a point not less than 5 feet above the highest part of the rope connection to the conveyance.
(f) The interior of the section of hoisting rope cut off in compliance with subsection (e) of this section shall be carefully examined for fatigue, wear, corrosion, or breaks.
(g) (19-120) If, upon inspection, any hoisting rope is found to be below any requirement set forth in this section, it shall forthwith be removed from service as a hoisting rope.
(h) Serious damage may be caused to the hoisting rope by shaft accidents, such as pulling the shaft conveyance into the sheave, piling up rope on a stopped conveyance, or by kinking or running over the rope when the conveyance is derailed.
In event of an accident which may have caused damage to the hoisting rope, such rope shall not be used to hoist or lower men until it has been inspected by a competent man and found to be safe.

s 7136. (19-120). Hoisting Rope Maintenance.
(a) No hoisting rope shall be allowed to drag or rub on any part of the hoistway, but shall be supported by rollers or guide pulleys located so as to prevent dragging or rubbing.
(b) Spliced hoisting ropes shall not be used in mines except as provided for in Section 7137 of these Orders.
(c) Every hoisting rope shall be kept well lubricated at all times.
(d) In all shafts containing acid water or a corrosive atmosphere, an acid-resistant preservative shall be used regularly on the hoisting rope, or a corrosion-resistant rope shall be used.

s 7137. (19-24). Hoisting Rope -Method of Attaching to Conveyance.
(a) The hoisting rope shall be attached to the shaft conveyance by one of the following methods:
(1) Thimble With Clip or Clamp Method. The rope shall be attached to the load by passing one end around an oval thimble that is attached to the load and bending the end back so that it is parallel to the long or "live" end of the rope and fastening the two parts of the rope together with clips or clamps.
The "U" bolt of each clip shall encircle the short or "dead" end of the rope, and the distance between clips shall not be less than the figures given in the table below.
The following number of clips shall be used for various diameters of 6-strand 19-wire plow steel ropes. (Follow manufacturer's recommendations for other kinds of wire rope.)
Diameter of Space between
rope (incehs) Number of clips clips (inches)
3/4........ 5 4 1/2
7/8........ 5 5 1/4
1............ 5 6
1 1/2........ 5 7
1 1/4........ 6 8
1/8........ 7 9
1 1/2........ 8 10
1 5/8........ 8 10
1 3/4........ 8 11
1 7/8........ 8 12
2............ 8 12

Where clamps other than "U" bolts are used, the manufacturer's recommendations shall be used.
For all wire ropes less than three-fourths inch in diameter, at least four clips shall be used.
When clips or clamps are installed on a hoisting rope, they shall be carefully tightened. A full load shall then be applied to the rope and the clips or clamps retightened under load before the rope is put into service.
During the first few days, the clips or clamps shall be inspected at frequent intervals and retightened as necessary.
(2) Zinc Socketing Method. For wire ropes over 1 1/4 inches in diameter, it is recommended that the zinc socketing method b used. If used, the work shall be done by a person experienced in this kind of work.

Babbit metal or lead for socketing wire ropes is prohibited.
(3) Thimble and Splice Method. The rope shall be attached to the load by passing one end around an oval thimble that is attached to the load, bending it back and fastening the "dead" end to the "live" line by splicing in such a manner as to develop the maximum efficiency possible for the particular rope size.
Such splice shall be made only by a workman skilled in wire rope splicing.

s 7138. Attaching Hoisting Cable to Hoisting Conveyance -Safety Hook.
(a) (19-75) No open hook shall be used with a shaft conveyance in hoisting, but some form of safety hook or shackle shall be used.
(b) In all shafts where men are hoisted or lowered, an emergency sling double clevis pin, or other attachment acceptable to the Division shall be used from the cable to the conveyance, so that should the clevis pin break, the emergency attachment will prevent the conveyance from falling.

s 7139. Hoist Signal System.
(a) (19-90) Every shaft shall be provided with an efficient means of interchanging distinct and definite signals between the top of the shaft and the lowest level and all other levels from which hoisting is done.
(b) (19-92) Every shaft in which hoisting is done shall be provided with an emergency signal system that can be operated from the shaft conveyance at any point in the shaft.
(c) Special care shall be taken to keep all signaling apparatus in good order, and necessary precautions shall be taken to prevent electric signal and telephone wires from coming into contact with other electric conductors, whether insulated or not.

s 7140. (19-90). Dual Signaling System.
(a) Every shaft in which men are hoisted or lowered shall be provided with a dual electrical system for shaft signaling.
(b) When a dual method of signaling is employed, one shall be a bell system to signal for movement of the shaft conveyance. It shall be used for no other purpose.
The second method shall be used to call for the shaft conveyance and may also be used for other communications, except to signal for movement of the shaft conveyance. This method shall consist of a system of telephones with buzzers or horns loud enough to be heard clearly.
(c) (19-92) The control for the signal for movement of the shaft conveyance shall be located at the shaft, within easy reach of a person in the shaft conveyance.
(d) The control for the signal used to call for the shaft conveyance shall be in a convenient location well away from the shaft.
(e) (19-10) Hoist controls shall be placed or hosed so that the noise from machinery or other sources will not prevent hoist men from hearing signals.

s 7141. (19-94). Hoisting Signal Code.
(a) When using signals for hoisting or lowering, the following system or code shall be used:
Signals Between Mine and Hoistman -

2-1 bells, to hoist rock.
1 bell, to stop if in motion.
1-2-1 bells, to release skip.
2 bells, to lower.
3-1 bells, man on; run slowly; men to be hoisted.
3-2 bells, man on; run slowly; men to be lowered.
7 bells and repeat, accident. Follow this signal with station signal.
3-3-1 bells, hoist cautiously.
3-3-2 bells, lower cautiously.
3-2-1 bells, ready to blast.

After receiving the signal "ready to blast," the hoistman shall give his signal when he is ready to hoist. The hoistman's signal "ready to hoist" is to raise the shaft conveyance 2 feet and lower it again.
(b) When a signal system is used to call for the shaft conveyance, the following code shall be used:
1-2 bells, collar of shaft 2 -1-2 bells, 20th level
1-3 bells, 1st level 2 -1-3 bells, 21st level
1-4 bells, 2d level 2 -1-4 bells, 22d level
1-5 bells, 3d level 2 -1-5 bells, 23d level
2-1 bells, 4th level 2 -2-1 bells, 24th level
2-2 bells, 5th level 2 -2-2 bells, 25th level
2-3 bells, 6th level 2 -2-3 bells, 26th level
2-4 bells, 7th level 2 -2-4 bells, 27th level
2-5 bells, 8th level 2 -2-5 bells, 28th level
4-1 bells, 9th level 2 -4-1 bells, 29th level
4-2 bells, 10th level 2 -4-2 bells, 30th level
4-3 bells, 11th level 2 -4-3 bells, 31st level
4-4 bells, 12th level 2 -4-4 bells, 32d level
4-5 bells, 13th level 2 -4-5 bells, 33d level
5-1 bells, 14th level 2 -5-1 bells, 34th level
5-2 bells, 15th level 2 -5-2 bells, 35th level
5-3 bells, 16th level 2 -5-3 bells, 36th level
5-4 bells, 17th level 2 -5-4 bells, 37th level
5-5 bells, 18th level 2 -5-5 bells, 38th level
6-1 bells, 19th level 2 -6-1 bells, 39th level

(c) (19-94) Easily legible copies of the hoisting signals shall be posted in a convenient location at the collar of the shaft, at each shaft station, and in the hoist room.
Note: When there are two or more shafts with hoists in the same mining operations, similarly identified levels shall have the same signal code number.
(d) (19-96) Any person responsible for receiving or giving signals for cages, skips, and man trips when men or materials are being transported shall be familiar with the posted signaling code.

s 7142. (19-94). Station Signal Boards.
There shall be placed at each station a signboard on which shall be displayed the number of the level and the method for calling the shaft conveyance.

s 7143. Lubricating Sheaves, Rollers, and Hoisting Equipment.
(a) The hoistman shall be informed immediately before lubricating or oiling operations are commenced, and again when such operations are finished.
(b) (19-107) The hoist shall not be operated or moved while the sheaves, rollers, or other hoisting equipment are being lubricated, except as directed by the oiler.

s 7146. Loading Men on Shaft Conveyance.
(a) The person in charge of the mine shall determine the maximum number of people allowed to ride in the shaft conveyance at one time.
(b) Legible signs stating the number of persons allowed to ride in the shaft conveyance at one time shall be posted conspicuously at the shaft collar and on each shaft station where employees board the shaft conveyance.
(c) (19-69) Some responsible person or persons shall be designated to supervise the loading of the shaft conveyance while the shift is being hoisted or lowered.
Such person or persons shall see that the men board the conveyance in an orderly fashion, that the posted maximum number of men allowed on the conveyance at one time is not exceeded, and that the proper hoisting signals are used.
(d) (19-50) It is forbidden to place boards across the top of a bucket or skip and permit men or materials to ride thereon. If boards are used, they shall be placed inside and at least 30 inches below the lip of the bucket or skip.
(e) Men shall be provided with a safe means for getting in and out of the shaft conveyance.
Where it is necessary for men to climb up or down inside the shaft conveyance for a distance of more than 4 feet, a ladder or some other device acceptable to the Division shall be kept in such conveyance while men are being hoisted or lowered.
(f) (19-71) Men shall not be permitted to ride on the bail or edge of the shaft conveyance.
(g) (19-70) The gates of the man-deck shall be closed and latched before a signal is given to move the shaft conveyance.
(h) No smoking or open-flame lights shall be permitted in the shaft conveyance while the shift is being hoisted or lowered.
(i) Crowding or scuffling of men in the vicinity of a shaft is strictly prohibited.

s 7147. Hoisting and Lowering Men -General Safe Practices.
(a) The safe rate of speed for the shaft conveyance shall be fixed by the employer for each shaft, and shall not be exceeded when hoisting or lowering men.
A notice of such speed limitation shall be posted in a conspicuous place near the hoist.
(b) When hoisting or lowering men with a bucket, the speed shall not exceed 200 feet per minute except in case of apprehended danger.
(c) At the beginning of each shift, the shaft conveyance shall make one full trip up and down each hoisting compartment before men are hoisted or lowered.
Such trips before carrying men shall also be made by the hoist conveyance in each hoisting compartment after repair work has been performed in the shaft and after the hoist has not been operated for a period of one hour or more.
(d) When the shaft conveyance has been released to the hoistman, it shall not be left at a landing but shall be hung up at least 10 feet above the shaft collar or level.
(e) A careful watch shall be kept over all hoisting equipment. A daily inspection shall be made of all such equipment and a report of any defect shall be made to the person in charge.
(f) Only authorized visitors and employees shall be permitted in the hoist room.
(g) When men are being hoisted in a skip or bucket, means shall be taken to prevent the lip of the skip from catching on the shaft timbers should the conveyance dip downward.
(h) (19-69) It is forbidden to get on or off a shaft conveyance while it is in motion.
(i) Hoisting or lowering men by animal power or by motor vehicles is prohibited.
(j) (19-71) Men shall not ride in skips or buckets with muck, supplies, materials, or tools other than small hand tools.
(k) (19-73) Rock or supplies shall not be hoisted in the same shaft as men during shift changes, unless the compartments and dumping bins are partitioned to prevent spillage into the cage compartment.

s 7148. Hoisting Tools and Materials.
(a) (19-80) All timbers, tools, and other materials that are longer than the shaft conveyance in which they are being hoisted or lowered shall be securely lashed to the cable at their upper ends, or otherwise secured, so they will safely ride up or down the shaft without catching on timbers, rocks, or other obstructions.
(b) Other material shall be secured to the shaft conveyance or enclosed in such manner that it cannot fall from the conveyance or catch on obstructions along the shaft.
(c) (19-79) Where mine cars are hoisted by cage or skip, means for blocking cars shall be provided at all landings and also on the cage.

s 7149. Hoistmen Required to Be on Duty.
(a) A qualified hoistman shall be in immediate charge of the hoist at all times when men are being hoisted or lowered.
Should any of the hoistman's duties be delegated to a learner, they shall be performed under the direct personal supervision of the qualified hoistman.
(b) At all times the shift is being hoisted or lowered, a man who is familiar with the operation of the hoist shall be present beside the hoistman, and be on the alert to assume immediate control of the hoist in the event that the hoistman should become incapacitated.
The standby man need not be a fully qualified hoistman, but shall be familiar with the operation of the hoist.
This subsection does not apply where the hoist is equipped with control devices that will automatically stop the hoist and apply the brake when the shaft conveyance reaches designated points at the top and bottom of the shaft.
(c) (19-55) A hoistman shall be on duty, within hearing of the hoist signal, as long as any man remains in a mine into which he has been lowered. He shall not at any time be more than 300 feet from his hoist.
(d) The hoistman shall not be permitted to engage in conversation while hoisting or lowering men.

s 7150. (19-58). Qualified Hoistman.
(a) At every mine where men are hoisted or lowered, there shall be one or more qualified hoistmen who shall operate the hoist while men are being hoisted or lowered.
(b) Qualified hoistmen shall be not less than 21 years of age and shall be able to speak and read English readily.
(c) Every qualified hoistman shall be familiar with the details and workings of mine hoists and must be experienced in their operation.
(d) Men who wish to become qualified hoistmen, but who have not had practical experience in hoisting and lowering men and material, must operate a hoist handling material a sufficient length of time under instruction of an experienced qualified hoistman until the employer considers the learner competent to hoist and lower men.
(e) Every qualified hoistman shall be given a thorough physical examination at least once a year by a physician licensed to practice medicine in California. The physician shall complete an examination form prescribed by the Division and send it to the employer after signing, detaching, and delivering the lower part to the applicant for posting in the hoist house.
No man shall be permitted to hoist or lower men until he has successfully passed the physical examination.
(f) The Division may require hoistmen who handle materials only to pass the prescribed physical examination where improper operation of the hoist might endanger an employee.

s 7160. (3-22). Daily Inspections.
(a) At least twice during each working shift, an inspection shall be made of every part of the mine where an employee is working or required to be in the course of his duties.
One such inspection shall be made during the early part of the work shift and another inspection shall be made during the latter part of the workshift.
Such inspections shall be made by a shift boss or other mine official, who must be at least 21 years of age, and able to speak, read, and write English.
(b) The man who makes the inspection shall watch for unsafe conditions and practices that may cause injury to employees. Immediate hazards such as missed holes, dangerous accumulations of gases, and unguarded chutes shall be corrected without unnecessary delay.
(c) If any dangerous or questionable ground is found in the roof or sides, it shall promptly be made safe by one or more of the following means:
(1) Scaling or blasting down
(2) Supporting
(3) Backfilling
(4) Erect barriers with warning signs to prevent entrance to the dangerous area.

s 7161. (19-120). Shaft Inspection.
Each shaft in which men or materials are hoisted or lowered shall be inspected each week by a man who is competent to make such inspection.
The man making the inspection shall list on a form prescribed by the Division all unsafe conditions found in the shaft and corrective measures necessary to make the shaft safe.
The weekly shaft report shall be signed by the man who made the inspection. The weekly shaft inspection report shall be kept at the mine office for two years, and shall be available for examination by representatives of the Division.

s 7162. (11-51a). Monthly Inspections.
(a) Some competent person or persons shall make an inspection at least once each month of all active workings of the mine and appliances in the mine, and shall report any unsafe conditions to the employer, who shall take immediate steps to remedy the same.
(b) The entire escape exit shall be inspected at least once each month for rock falls, fire hazards, deterioration of ladders, timbers, and other equipment necessary to maintain an adequate escapeway.
If any condition is found in an escape exit making it inadequate for an escapeway, repairs shall be commenced immediately and completed with reasonable diligence.
A written report shall be made of the escape exit inspection. The report shall list all hazardous conditions found in the escape exit. It shall be signed by the person or persons who made the inspection, and shall be kept at the mine office for two years, during which period it shall be available for examination by representatives of the Division.
Note: If desired, the general mine inspection and escape exit inspection required by subsections (a) and (b) may be combined with the safety committee inspection required by Section 6964.

s 7164. Telephone System.
(a) A telephone system shall be installed and maintained in good working condition in every mine which:
(1) Has reached a depth of 500 feet.
(2) Is entered by an audit or tunnel in which mining or development work is being done at a distance more than 1,000 feet from the entrance.
(b) The telephone system shall be equipped with telephones on the surface and at each working level 100 feet or more below the surface.
(c) Mines opened by a shaft having an inclination of less than 20 degrees from the horizontal shall be considered, for the purpose of this Order, to be mines opened by tunnels or adits.

s 7165. Emergency Telephone.
At every mine with an escape exit required by these Orders, telephone communication for emergency purposes shall be provided between the underground telephone stations and the principal surface telephone station, by way of the escape exit, provided, however, that other equally rapid means of communication may be used between surface stations.
Such emergency system shall be in addition to the telephone system required by Section 7164.

s 7166. Telephones for Shaft Work.
When a shaft-sinking or shaft-deepening operation reaches a depth of 100 feet below the shaft-sinking hoist, a telephone system shall be installed for communication between the shaft crew and the hoistman.
It is recommended that a portable type of telephone be provided for the shaft crew so that it can be kept near their working place during working hours.

s 7175. (20-10). Retaining Dams.
(a) If failure of a water or silt retaining dam will create a hazard, it shall be of substantial construction and inspected at regular intervals.
(b) (20-10) No restraining dam shall be installed in any mine where the rupture of such dam would imperil the safety of men in said mine or other mine until the Division has given its approval for the construction of said dam.

s 7176. (20-10). Protection Against Water.
(a) No mine working shall be allowed to approach within 16 feet of any part of a winze, stope, or other opening in which there is a known or suspected dangerous accumulation of water.
(b) Notice shall be given to the Division in writing before starting to advance a mine working toward another mine working that is suspected of being filled with water.
(c) A bore hole shall be drilled at least 18 feet ahead of the face when in the vicinity of mine workings suspected of containing a dangerous accumulation of water.
When the exact location of such working is not known, additional bore holes at least 18 feet deep shall be drilled in other directions.
(d) In every mine where there is danger of a sudden inburst of water, additional raises, drifts, bulkheads, or other workings shall be constructed as are necessary in the opinion of the Division to insure the escape of workmen.
(e) No underground mine working shall be allowed to approach within 50 feet of any stream, pond, or other body of water on the surface.

s 7178. Dangerous Excavations.
(a) (20-20) Access to unattended mine openings shall be restricted by gates or doors, or the openings shall be fenced and posted.
(b) (20-21) Every dangerous surface excavation in which work has been discontinued, including any tunnel, mine shaft, pit, well, septic tank, cesspool, or other abandoned excavation, shall be securely covered over, fenced, or otherwise effectively guarded and appropriate danger notices shall be posted.
(c) (20-21) All dangerous inactive or abandoned underground mine workings shall be securely covered over, fenced, or otherwise effectively guarded to prevent entrance of employees into such workings.
Where the method of guarding does not positively prevent entrance into the dangerous workings, such entrance shall be plainly marked with legible signs warning unauthorized employees to keep out.
(d) (20-31) In areas where dangerous accumulations of water, gas, mud, or fire atmosphere could be encountered, men shall be removed to safe places before blasting.

s 7180. Electrical Equipment and Installations.
The provisions of T8-7180 of Part 6, T-24, are incorporated herein as a part of these regulations and reads as follows:
T8-7180. Electrical Equipment and Installations.

In addition to the provisions of Part 2, the following shall apply to all mine construction. All electrical wiring and equipment shall be installed and maintained in compliance with the Electrical Safety Orders for underground and Part 3, T-24, CAC for surface buildings.

s 7181. Trailing Electrical Power Cables -General.
(a) Trailing electric power cables shall be used only in continuous lengths except when connections are made with a connector or splice box of approved design.
(b) Branch circuits shall not be installed on trailing electric power cables.
(c) Vehicles shall not be driven over electric power cables unless such cables are protected from mechanical injury and the vehicles prevented from coming in contact with cables.
(d) Where a trailing electric power cable passes over an industrial railway track or vehicular road, it shall be securely supported by poles, horses, or other means so as to provide a safe clearance between the cable and any equipment used on the railway or vehicular road.
(e) Trailing electric power cables shall be connected to mobile equipment in such manner that tension will not be transmitted to the joints or terminals screws of the fittings. This shall be accomplished by a special fitting designed for such purpose, or by other equally effective means.
(f) Cable tongs, cable hooks, or slings with insulated handles shall be used when handling energized trailing electric power cables .
(g) Noncurrent-carrying metal parts of portable equipment using trailing electric cables shall be grounded by means of a grounding conductor run with the circuit conductors in cable assemblies or flexible cords; this conductor may be uninsulated but if an individual covering is provided for this conductor, it shall be finished to show a green color.

s 7182. Trailing Electric Power Cables, Maintenance and Repair.
(a) Trailing electric power cables shall be maintained in good repair.
(b) Conductors of trailing electric power cables shall be so spliced or joined as to be mechanically and electrically secured without solder and unless an approved splicing device is used, shall then be soldered with a fusible metal or alloy or brazed or welded. All splices and joints and free ends of conductors shall be covered with an insulation equivalent to that on the conductors.
(c) When the jackets of trailing electric power cables have been cut or damaged so that their insulation protection is substantially reduced, or when the conductors of such cables have been sliced, the jackets shall be repaired and vulcanized so that the repaired section will have insulating properties equivalent to the original electric cable cover.

s 7183. Federal Electrical Standards.
(a) Except as provided herein, the Bureau of Mines Mandatory Electricity Standards published July 31, 1969, February 25, 1970 and December 8, 1970 are adopted as part of these orders and read as follows:
Exception: In no case shall the minimum requirements be less than those established in the Electrical Safety Orders, T-8, CAC and Part 3, T-24, CAC.
GENERAL

(1) (12-1) Circuits shall be protected against excessive overload by fuses or circuits breakers of the correct type and capacity.
(2) (12-2) Electric equipment and circuits shall be provided wit switches or other controls. Such switches or controls shall be of approved design and construction and shall be properly installed.
(3) (12-3) Individual overload protection and short circuit protection shall be provided for the trailing cables of mobile equipment.
(4) (12-7) Trailing cables and power-cable connections to junction boxes shall not be made or broken while energized.
(5) (12-11) High-potential transmission cables shall be covered, insulated, or placed to prevent contact with low-potential circuits.
(6) (12-14) Shovel trailing cables shall not be moved with the shovel dipper unless cable slings or sleds are used.
(7) (12-16) Electrical equipment shall be deenergized before work is done on such equipment. Switches shall be locked out or other measures taken which shall prevent the equipment from being energized without the knowledge of the individuals working on it. Such locks, or preventative devices shall be removed only by the persons who installed them or by authorized personnel.
(8) (12-17) Power circuits shall be deenergized before work is done on such circuits unless hotline tools are used. Suitable warning signs shall be posted by the individuals who are to do the work. Switches shall be locked out or other measures taken which shall prevent the power circuits from being energized without the knowledge of the individuals working on them. Such locks, signs, or preventative devices shall be removed only by the person who installed them or by authorized personnel.
(9) (12-18) All switches, automatic cutouts, or other control devices shall be located or marked as to clearly indicate the equipment controlled by them, and switches (excepting magnetic switches) shall indicate whether they are open or closed.
(10) (12-20) Dry wooden platforms, insulating mats, or other electrically-nonconductive material shall be kept in place at all switchboards and power-control switches where shock hazards exist. However, metal plates on which a person normally would stand and which are kept at the same potential as the grounded, metal, noncurrent-carrying parts of the power switches to be operated may be used.
(11) (12-21) Suitable danger signs shall be posted at all major electrical installations.
(12) (12-23) Electrical connections and resistor grids that are difficult or impractical to insulate shall be guarded, unless protection is provided by location.
(13) (12-25) All metal enclosing or encasing electrical circuits shall be grounded or provided with equivalent protection. This requirement does not apply to battery-operated equipment.
(14) (12-26) Metal fencing and metal buildings enclosing transformers and switchgear shall be grounded.
(15) (12-27) Frame grounding or equivalent protection shall be provided for mobile equipment powered through trailing cables.
(16) (12-28) Continuity and resistance of grounding systems shall be tested immediately after installation.
(17) (12-30) When a potentially dangerous condition is found it shall be corrected before equipment or wiring is energized.
(18) (12-33) Hand-held electric tools shall not be operated at high potential voltages.
(19) (12-36) Fuses shall not be removed or replaced by hand in an energized circuit, and they shall not otherwise be removed or replaced in an energized circuit unless equipment and techniques especially designed to prevent electric shock are provided and used for such purpose.
(20) (12-37) Fuse tongs or hot line tools shall be used when fuses are removed or replaced in high-potential circuits.
(21) (12-40) Operating controls shall be installed so that they can be operated without danger of contact with energized conductors.
(22) (12-41) Switches and starting boxes shall be of safe design and capacity.
(23) (12-45) Overhead high-potential powerlines lines shall be installed as specified by the Electrical Safety Orders and Part 3, T-24, CAC.
(24) (12-47) Guy wires of poles supporting high-potential conductors shall be equipped with insulators installed near the pole end.
(25) (12-48) Telegraph, telephone, or signal wires shall not be installed on the same crossarm with power conductors. When carried on poles supporting powerlines, they shall be installed as specified by the Electrical Safety Orders and Part 3, T-24, CAC.
(26) (4-10) Power wires and cables shall be adequately insulated. Flexible cords and cables shall not be used as a substitute for fixed wiring and shall be adequately protected when subject to physical damage.
(27) (4-11) Abandoned electrical circuits shall be de-energized and isolated so that they cannot become energized inadvertently.
SURFACE ONLY

(28) (12-65) Powerlines, including trolley wires, and telephone circuits shall be protected against short circuits and lightning.
(29) (12-66) Where metallic tools or equipment can come in contact with trolley wires or bare powerlines, the lines shall be guarded or deenergized.
(30) (12-67) Transformers shall be totally enclosed, located on poles or shall be enclosed in compliance with the Electrical Safety Orders.
(31) (12-68) Transformer enclosures shall be kept locked against unauthorized entry.
(32) Provisions for preventing accidents due to overhead high-voltage lines shall be in conformance with the High-Voltage Electrical Safety Orders, Article 86, which reads:
Article 86. Provisions for Preventing Accidents Due to Proximity of Overhead
Lines

2946. Provisions for Preventing Accidents Due to Proximity to Overhead Lines.

(a) General. No person, firm, or corporation, or agent of same, shall require or permit any employee to perform any function in proximity to energize high-voltage lines; to enter upon any land, building, or other premises and thereto engage in any excavation, demolition, construction, repair, or other operation; or to erect, install, operate, or store in or upon such premises any tools, machinery, equipment, materials, or structures (including scaffolding, house moving, well drilling, pile driving, or hoisting equipment) unless and until danger from accidental contact with said high-voltage lines has been effectively guarded against.
(b) Clearances or Safeguards Required. Except where electrical distribution and transmission lines have been deenergized and visibly grounded or effective barriers have been erected to prevent physical and arcing contacts with the high-voltage lines, the following provisions shall be met:
(1) Over Lines. The operation, erection, or handling of tools, machinery, apparatus, supplies, or materials, or any part thereof, over energized high-voltage lines shall be prohibited.

(2) Equipment and Materials in Use. The operation, erection, or handling of tools, machinery equipment, apparatus, materials, or supplies, or any part thereof within the minimum clearances from energized lines set forth in Table X shall be prohibited.
Table X

Required Clearances from Overhead High-Voltage Lines

Nominal Voltage Minimum Required
(Phase to Phase) Clearance (Feet)
750- 50,000....... 10
Over 50,000- 75,000....... 11
Over 75,000- 125,000...... 13
Over 125,000- 175,000...... 15
Over 175,000- 250,000...... 17
Over 250,000- 370,000...... 21
Over 370,000- 550,000...... 27
Over 550,000- 1,000,000.... 42

(3) Transportation or Transit. The transportation or transit of any tool, machinery, equipment, or apparatus, or the moving of any house or other building in proximity to overhead high-voltage lines shall be expressly prohibited if at any time during such transportation or transit such tool, machinery, equipment, apparatus, or building or any part thereof, can come closer to high-voltage lines than the minimum clearances set forth in Table Y.
Except where the boom of boom-type equipment is lowered and no load is imposed thereon, the equipment in transit shall conform to the minimum required clearances set forth in Table X.
Table Y

Required Clearances from Energized High-Voltage Conductors

(While in Transit)

Nominal Voltage Minimum Required
(Phase to Phase) Clearance (Feet)
750- 50,000....... 6
Over 50,000- 345,000...... 10
Over 345,000- 750,000...... 16
Over 750,000- 1,000,000.... 20

(4) Storage. The storage of tools, machinery, equipment, supplies, materials, or apparatus under, by, or near energized high-voltage lines is hereby expressly prohibited if at any time during such handling or other manipulation it is possible to bring such tools, machinery, equipment, supplies, materials, or apparatus, or any part thereof, within the minimum required clearances from high-voltage lines as set forth in Table X.
(c) The specified clearance shall not be reduced by movement due to any strains impressed (by attachments or otherwise) upon the structures supporting the high-voltage line or upon any equipment, fixtures, or attachments thereon.
(d) Insulated cage-type boom guards, boom stops, insulating links, or proximity warning devices may be used on cranes, but the use of such devices shall not alter the required clearances set forth in Table X.

(e) Any overhead conductor shall be considered to be energized unless and until the person owning or operating such line verifies that the line is not energized, and the line is visibly grounded at the work site.
2947. Warning Signs Required. The owner, agent, or employer responsible for the operations of equipment shall post and maintain in plain view of the operator and driver on each crane, derrick, power shovel, drilling rig, hay loader, hay stacker, pile driver, or similar apparatus, a durable warning sign legible at 12 feet reading: "UNLAWFUL TO OPERATE THIS EQUIPMENT WITHIN 10 FEET OF HIGH-VOLTAGE LINES OF 50,000 VOLTS OR LESS."
In addition to the above wording, the following statement in small lettering shall be provided on the warning sign: "For Minimum Clearances Of High-Voltage Lines In Excess of 50,000 Volts. See Article 86, Title 8, High-Voltage Electrical Safety Orders."
2948. Notification to the Operators of High-Voltage Lines and Responsibility
for Safeguards.

When any operations are to be performed, tools, or materials handled, or equipment is to be moved or operated within the specified clearances of any energized high-voltage lines, the person or persons responsible for the work to be done shall promptly notify the operator of the high-voltage line of the work to be performed and shall be responsible for the completion of the safety measures as required by Order 2946(b) before proceeding with any work which would impair the aforesaid clearance.
2949. Special Exemptions.

The provisions of the foregoing Orders 2946 through 2948 shall not apply to the construction, reconstruction, maintenance, or operation of any energized high-voltage overhead lines or their supporting structure or appurtenances by qualified electrical workers, nor to work performed in proximity to high-voltage lines by qualified persons using approved equipment and work procedures.
UNDERGROUND ONLY

(33) (12-80) Trolley wires and bare power conductors shall be guarded at man-trip loading and unloading points, and at shaft stations. Open unguarded trolley wires shall be placed not less than 9 feet above the track, or not less than 6 inches outside of the rail and not less than 7 feet above the rail.
(34) (12-82) Powerlines shall be well separated or insulated from waterlines, telephone lines, and air lines.
(35) (12-85) Transformer stations shall be enclosed to prevent persons from unintentionally or inadvertently contacting energized parts.

Note: Authority cited: Section 6500, Labor Code.

s 7200. Minors.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7201. (6-90). Training.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7202. (6-92). Deteriorated Explosives.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7203. Explosives for Blasting.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7204. Water Gels.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7205. Black Powder Blasting.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7206. Explosives for Underground Use.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7207. (6-123) (6-124). Electric Detonation of Explosives During Lightning and Dust Storms.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7208. (6-52). Smoking and Open Flames.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7210. Storage -General Requirements.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7211. (6-20). Quantity and Distances Table for the Storage of Explosives - Class A.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7212. Quantity and Distance Table for Storage of Explosives -Class B Distances in Feet When Storage Is Unbarricaded.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7213. First-Class Magazines.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7214. (6-27) Second-Class Magazines.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7215. (6-20). Storage Within First-Class Magazines.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7216. Makeup or Primer House for Blasting Operations.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7217. Storage of Explosives Underground.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7220. General.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7221. Surface Transportation.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7222. Transportation of Explosives -Underground - General.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7223. Transportation of Explosives -Hoisting or Lowering.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7224. Rail Transportation of Explosives -Underground.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7225. Transportation of Explosives -Underground - Special Trackless Vehicles.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7226. Transportation of Explosives -Manual.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7227. Transportation of Explosives -Air and Water.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7230. General.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7231. (6-100). Tamping Poles and Devices.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7232. Loading Explosives -General.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7233. Loading and Blasting Near and Under Power Lines.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7234. Pneumatic Loading of Explosives and Blasting Agents.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7235. (6-160) (6-175). Firing of Explosives.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7236. Secondary Blasting.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7237. Misfires.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7240. Coyote Hole Blasting.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7241. (6-112). Use of Safety Fuse -General.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7242. (6-108). Safety Fuse Storage.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7243. Making Capped Fuses and Primers.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7244. Blasting with Safety Fuse -Hazards of Blasting with Safety Fuse.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7250. Firing with Electricity -General.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7251. Firing Switches.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7252. Auxiliary Switches.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7253. Permanent and Temporary Leading Wires.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7254. Blasting Procedure with Power and Light Circuits.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7255. Blasting with Batteries, Blasting Devices, and Blasting Machines.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7256. Electric Blasting in Proximity with Radio Transmitters.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7260. General.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7261. Mixing of Blasting Agents -Location.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7262. Buildings.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7263. Mix Room Equipment.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7264. Composition.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7265. Blasting Agent Storage.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7266. Transportation of Blasting Agents.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7267. On-Site Mixed Water Gels and Blasting Agents.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7275. Competency of Blasters.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7276. Blaster's License -Qualifications.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7277. Blaster's License -Application and Examination.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7278. Expiration and Renewal.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7279. Custody of Blaster's License.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7280. Blasting Accident Reports and Procedures.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7281. Suspension -Blaster's License.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7282. Labor Code Excerpts.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

s 7283. Blaster's License Fees.

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

Appendix A

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

Appendix B

Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.

<<(Subchapter Originally Printed 4-20-75 Revised 11-1-75)>>

s 8345. Title.
These Safety Orders shall be known as Ship Building, Ship Repairing and Ship Breaking Safety Orders, and shall take precedence over all other Safety Orders insofar as any inconsistencies are concerned. The other Safety Orders will apply to all conditions or exposures not specifically covered by these Orders.

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code. (continued)