scope:

This UFC provides safety requirements and guidance for anyone working on or near electrical components rated at 50 volts or above in facilities and related infrastructure. The scope includes electrical substations and switching stations, the associated distribution systems, and extending to electrical distribution systems inside facilities, including electrical equipment covered by UFC 3-501-01.

For the purposes of this UFC, low voltage is defined as 1,000 volts or less. Voltages higher than 1,000 volts are referred to as high voltage. Refer to the Glossary for definitions.

Note: The prior edition of this UFC designated 600 volts as the upper limit for low voltage because this voltage was considered the highest low voltage that would be typically encountered. The designation of 1,000 volts as low voltage has been chosen to be consistent with NFPA 70E and NFPA 70. However, NFPA 70E provides the same approach distances for voltages between 751 volts to 15 kV, and refers to voltage above 600 volts as medium voltage in its Annex D. NFPA 70 provides different requirements for voltages below 600 volts, between 600 and 1,000 volts, and above 1,000 volts.

Need.

Electrical personnel involved in operating and maintaining electrical facilities can be injured and equipment can be damaged whenever electrical systems and components are not handled safely. The adoption and enforcement of safe electrical practices will reduce the hazards to personnel.

Familiarity and Requirements.

Each worker must understand and apply those safety requirements of this UFC that apply to the work performed. This safety manual must be readily available to each worker for reference and study.

Mishap Prevention.

Mishap prevention is a basic responsibility of every worker. Personal safety, fellow workers' safety, and the general public's safety depend upon compliance with this manual's requirements. Safety takes precedence over work production.

Unclear Conditions.

If this UFC does not cover a specific working condition or job requirements are unclear, workers must obtain clear instructions from an authorized individual-in-charge before proceeding with the work.