Electrical

• 1. All electrical conductors and equipment will be approved for use on jobsite.

• 2. Supervisors of trades will ensure that electrical equipment is free from recognized hazards that are likely to cause death or serious physical harm to employees.

• 3. Sufficient access and working space shall be provided and maintained around all electric equipment to permit ready and safe operation and maintenance of such equipment.

• All lamps for general illumination will be protected from accidental contact or breakage. Metal-case sockets will be grounded.

• Temporary lights will not be suspended by their electric cords unless cords and lights are designed for this means of suspension.

• Live parts of electric equipment operating at 50 volts or more will be guarded against accidental contact by cabinets or other forms of enclosures, or by any of the following means:

  • By location in a room, vault, or similar enclosure that is only accessible to qualified and experienced persons.

  • By partitions or screens so arranged that only qualified persons will have access to the space within reach of the live parts. Any openings in such partitions or screens will be so sized and located that persons are not likely to come into accidental contact with the live parts or to bring conducting objects into contact with them.

  • By location on a balcony, gallery, or platform so elevated and arranged as to exclude unqualified persons.

  • By elevation of 8 feet (2.44 m) or more above the floor or other working surface and so installed as to exclude unqualified persons.

• Entrances to rooms and other guarded locations containing exposed live parts will be marked with conspicuous warning signs forbidding unqualified persons to enter.

Flexible cords and cables will be protected from damage.

• Sharp corners and projections will be avoided.

• Flexible cords and cables may pass through doorways or other pinch points, if protection is provided to avoid damage.

It is recommended that extension cord sets used with portable electric tools and appliances should be of three-wire type and will be designed for hard or extra-hard usage

• • Flexible cords used with temporary and portable lights will be designed for hard or extra-hard usage.

  • All cord sets will be used with a GFCI circuit.

  • NOTE: The National Electrical Code, ANSI/NFPA 70, in Article 400, Table 400-4, lists various types of flexible cords, some of which are noted as being designed for hard or extra-hard usage. Examples of these types of flexible cords include hard service cord (types S, ST, SO, STO) and junior hard service cord (types SJ, SJO, SJT, SJTO).

  • Table 400-4 Pages 4-9

Flexible cords will be used only in continuous lengths without splice or tap.

• Hard service flexible cords No. 12 or larger may be repaired if spliced so that the splice retains the insulation, outer sheath properties, and usage characteristics of the cord being spliced.

• Temporary power supplied on a CHASSE Building Team project will be equipped with ground fault circuit interrupters (GFCI). Each GFCI will be checked every time a cord is plugged into a receptacle.

• All 120-volt, single-phase 15- and 20-ampere receptacle outlets on CHASSE construction sites, which are not a part of the permanent wiring of the building or structure and which are in use by employees, will have approved ground-fault circuit interrupters for personnel protection. Receptacles on a two-wire, single-phase portable or vehicle-mounted generator rated more than 5kW, where the circuit conductors of the generator are insulated from the generator frame and all other grounded surfaces, will be protected with ground-fault circuit interrupters as well.