34 Pa. Code Ch. 39 — Safety Standards—General

MOTORS AND MOTOR DRIVEN MACHINERY § 39.251. Control devices. (a) Separately excited direct-current motors, also series motors, and motor generators and converters larger than ten kilowatts where it is possible for them to be driven at excessive speed from the direct-current end, …

§ 39.252. Hazardous locations. Motors in which sparking or arcing may occur during operation, shall, if practicable be kept out of locations where explosives or inflammable gas or inflammable flyings exist. If necessarily in such locations, they shall be suitably protected. Refer…

§ 39.253. Deteriorating agencies. (a) Suitable guards or enclosures shall be provided to protect exposed current-carrying parts of motors and the insulation of motor leads when installed directly under equipment or in other locations where dripping oil, excessive moisture, steam,…

§ 39.254. Guards for live parts. (a) Motors operating at over 150 volts to ground, unless isolated by elevation at least 8 feet above the floor line, should, if practicable, be provided with permanent inclosures or other suitable guards so arranged as to prevent persons or conduc…

§ 39.255. Protecting moving parts. Suitable guards or enclosures shall be arranged at each motor or motor driven machine when necessary to prevent persons or objects from inadvertently coming in harmful contact with moving parts, including chains, belts, gears and pulleys.

§ 39.26. Electrical hazards. (a) General. Hands and tools should be kept away from all electric circuits and apparatus. (b) Grounding for static. If static electricity exists, belts and rapidly moving parts of machines should be grounded. In the presence of explosive or flammable…

ELECTRIC FURNACES AND WELDING § 39.261. Protection from burns. (a) Electric furnaces and apparatus used for arc welding where intensely glowing, incandescent, or arcing parts are exposed, shall be enclosed, so that those parts are not accessible or visible to unauthorized persons…

§ 39.262. Grounding. The outside noncurrent-carrying metallic frames of furnaces shall be permanently grounded if they contain current-carrying parts connected to circuits above 150 volts to ground, or if the circuit within is not grounded and is exposed through transformer windi…

§ 39.263. Guarding live parts. Except at points where necessarily left exposed, as at spot welder contacts, current-carrying parts of furnaces, welders, and control equipment shall be suitably guarded with enclosures or barrier guards. Cross References This section cited in 34 Pa…

§ 39.27. Handling objects by hand. (a) Material of length, such as pipe, lumber or ladders, when carried by one man, should be so carried that the front end is high enough to avoid striking persons approaching from around corners or from other projections. (b) The carrying of ver…

LIGHTING FIXTURES AND SIGNS § 39.271. Grounding. (a) Unless otherwise provided by § 39.197(d) (relating to grounding), exposed noncurrent-carrying metal parts of lighting fixtures and other similar fixed electrical devices shall be permanently grounded when used under the followi…

§ 39.272. Insulation. (a) Electric fixtures shall be provided with an adequate and mechanically protected dielectric, complying with the standardization rules of the American Institute of Electrical Engineers (A.I.E.E.), interposed between ungrounded current-carrying parts and th…

§ 39.273. Exposed live parts. Unless otherwise provided by § 39.272 (relating to insulation), electric fixtures including lamp sockets and lamp bases, plugs, receptacles, and the like, shall be so designed and installed that no current-carrying parts will normally be exposed exte…

§ 39.274. Accessibility and guarding of signs. (a) Electric signs at an elevation greater than 30 feet above roadways or footways, or at an elevation above a roof greater than the distance from the edge of the roof shall, if they require attendance while in position, be provided …

§ 39.275. Control of outdoor signs. Electric signs, located as noted in § 39.274 (relating to accessibility and guarding of signs), shall be provided with switches arranged to entirely disconnect all feed wires of the sign, and either located within sight of the sign or arranged …

§ 39.276. Connectors for signs. Electric signs shall be so arranged that changeable connections can be made manually only by approved connectors in which all poles of the circuit are simultaneously interrupted. All current-carrying parts of pin and socket connectors shall be prov…

§ 39.277. Isolated or guarding lamps in series circuits. (a) Arc and incandescent lamps and other devices in series circuits, except in grounded circuits of which no part exceeds 150 volts to ground, shall be effectively isolated or suitably guarded. (b) All metal cable or chain …

§ 39.278. Safe access to arc lamps. A suitable device shall be provided by which each arc lamp or other device of series circuits may be safely and entirely disconnected from the circuit before it is handled, unless the lamps are accessible only to properly qualified persons, wor…

§ 39.28. Cranes. (a) Employes should keep from under a load being swung, hoisted, lowered, or backed up. No person should ride on top of a crane bridge or carriage or on the load. A craneman should not move cranes with chains swinging full length, or while hookmen or others are i…

PORTABLE DEVICES, CABLES AND CONNECTORS OTHER THANFOR SIGNAL SYSTEMS § 39.281. Insulation. (a) Portable devices shall be provided with an adequate dielectric, complying with the standardization rules of the American Institute of Electrical Engineers (A.I.E.E.), interposed between…

§ 39.282. Grounding. (a) The permanent grounding of frames of portable devices, especially in connection with voltage above 150 to ground and for any voltage when the devices are used within eight feet of the floor in locations such as bathrooms, laundries, and the like, where pe…

§ 39.283. Cable connectors. (a) Where used with portable conductors connectors should be used which necessarily disconnect both or all poles from the live source of energy where the circuit is opened. (b) Connectors shll be so constructed, with guards when necessary, that the per…

§ 39.284. Identified conductors, cords, and connectors. (a) Where used with portable devices, the cases of which are designed to be grounded in accordance with the provisions of § 39.282 (relating to grounding), the portable cable and the separable connectors, both to the device …

§ 39.285. Use of portables and pendants. (a) Portable and pendant conductors shall not be installed or used on circuits operating at over 300 volts to ground, unless they are accessible only to persons authorized to approach them. In such cases they shall be of a type suited to t…

§ 39.29. Conveyors, hand and automotive vehicles. (a) Defective wheels. Vehicles with wheels or other parts that are broken, cracked, or otherwise defective should be removed from service until the defective parts have been repaired or replaced with parts free from defects. (b) W…

ELECTRICALLY OPERATED CARS, CRANES, AND ELEVATORS § 39.291. Guarding live and moving parts. (a) Current-carrying parts. Current-carrying parts connected to circuits above 150 volts to ground shall be so isolated or guarded that no person may inadvertently come in contact with the…

§ 39.292. Grounding noncurrent-carrying parts. (a) Exposed noncurrent-carrying metal parts of electrical equipment at over 150 volts to ground shall be permanently grounded. In electric cars steam or hot water heating devices accessible to the public shall also be grounded. The g…

§ 39.293. Control of energy supply to cars and cranes. (a) Readily accessible means shall be provided whereby conductors and equipment located in or on cars or cranes may be disconnected entirely from the source of energy at a point as near as possible to the trolley or other cur…

§ 39.294. Control of movement of cars, cranes, and elevators. (a) Means shall be provided whereby the operator, whether motorman or elevator attendant, may prevent the starting of the equipment by unauthorized persons while he is absent from his post. Removable reverse levers or …

§ 39.295. Subway and car lighting. Subways and similar locations used for passenger transportation where artificial illumination is indispensable shall be lighted throughout their entire length by a system independent of the current for electric traction where such is used. Passe…

§ 39.3. Purposes. This subchapter sets forth rules and recommendations to safeguard the lives, limbs, and health of workers in all establishments within this Commonwealth.

§ 39.30. Dusts, gases, and volatile liquids. (a) Dusts. If dusts are likely to be present, there should be compliance with the following: (1) The striking of matches; the smoking of cigars, cigarettes, or pipes; the use of open flames, open fire, open lights or arc-forming electr…

TELEPHONE AND OTHER SIGNAL APPARATUS ON CIRCUITSEXPOSED BY SUPPLY LINES § 39.301. Guarding noncurrent-carrying parts. (a) If telephone or other signal apparatus, not included under subsection (b) of this section, which is necessarily handled by persons is permanently connected, e…

§ 39.302. Guarding current-carrying parts. (a) Telephone or other signaling devices which are permanently located outdoors or if exposed to corrosive fumes or dampness, such as may occur in subways, cellars, basements, laundries, stables, and the like, shall be so arranged that u…

§ 39.303. Protection against induced voltages. Telephone or other signaling equipment which is necessarily handled by persons and which is connected to a line that parallels a supply circuit in such manner that by reason of exposure to the supply circuit under normal operating co…

§ 39.304. Grounding of arresters for signaling systems. (a) Exemptions. The ground connections for outside installations of cable protectors employed solely to prevent electrical injury to the cable need not conform to the requirements of this section. For the provisions governin…

§ 39.31. Elevators. (a) All landing doors or gates at the entrances to shaftways should be closed and locked when the car is not at such landings. This shall be accomplished in accordance with the requirements of Chapter 7 (relating to elevators, lifts, escalators, dumbwaiters, h…

RULES FOR THE EMPLOYER—ORGANIZATION § 39.311. Interpretation and enforcement of rules. (a) The employer shall furnish to each regular employe operating or working on electrical supply equipment, supply or signal lines, or hazardous electrical tests a copy of these safety rules fo…

§ 39.312. Organization diagram. To better secure the safe and accurate performance of work, an organization diagram or written statement clearly showing the division of responsibility between officials and employes, down to and including the grade of foreman, should be supplied w…

§ 39.313. Address list and emergency. (a) The rule book should contain or be accompanied by the following: (1) A list of names and addresses of those physicians and members of the organization who are to be called upon in emergencies. (2) A copy of rules for first aid, resuscitat…

§ 39.314. Instructing employes. Employes regularly working on or about equipment or lines shall be thoroughly instructed in methods of first aid, resuscitation, and, if advisable, in fire extinguishment.

§ 39.315. Qualifications of employes. The employer shall use every reasonable means and precaution to assure himself that each employe is mentally and physically qualified to perform his work in accordance with these rules.

§ 39.316. Chief operator. (a) A properly qualified chief operator, system operator, load dispatcher, general superintendent, or otherwise designated employe, whose duties are those prescribed in § 39.351 (relating to duties of chief operator), shall be in charge of the operation …

§ 39.317. Responsibility. If more than one person is engaged in work on or about the same electrical equipment or lines at any one location, one of the persons shall be designated as the foreman locally in charge of the work; or workmen shall be instructed as to the work they are…

§ 39.32. Explosives. (a) Caps. Blasting caps and electric blasting caps are copper shells which protect and contain a very sensitive explosive which will explode from shock, heat, or by friction or by spark. The explosive contained in caps should not be touched, picked or disturb…

PROTECTIVE METHODS AND DEVICES § 39.321. Attendance. Unless a qualified employe is kept on duty where generators or rotary converters are operating, the equipment shall be made inaccessible to unauthorized persons.

§ 39.322. Requirement for two workmen. Except in trouble or emergency work, at least two employes should be provided where work is done on live lines above 750 volts in wet weather or at night.

§ 39.323. Uninstructed workmen and visitors. Unqualified employes or visitors shall be prohibited from approaching live parts, unless accompanied by a qualified employe.

§ 39.324. Diagrams for chief operator. Diagrams or equivalent devices, showing plainly the arrangement and location of the electrical equipment and lines, should be maintained on file or in sight of the chief operator. These diagrams may be of the entire system, of each specific …

§ 39.325. Instructions to employes. (a) Employes shall be instructed as to the character of equipment or lines on or dangerously near to, work which is done by them. (b) Instructions shall describe the equipment and lines to be worked on, identifying them by position, letter, col…