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Page 78

Glossary of Terms (continued)

OSHA Occupational Safety and Health Administration—Federal agency in the U.S. Department of Labor that establishes and enforces work- place safety and health regulations

overcurrent protection device device that shuts off the current in a circuit when it reaches a certain level

overload too much current in a circuit

power amount of energy used each second, measured in watts

PPE personal protective equipment (eye protection, hard hat, special clothing, etc.)

qualified person someone who has received mandated training on the hazards and on the construction and operation of equipment involved in a task

resistance material’s ability to decrease or stop electrical current

risk chance that injury or death will occur

shocking current electrical current that passes through a part of the body

short low-resistance path between a live wire and the ground, or between wires at different voltages (called a fault if the current is unintended)

tag-out applying a tag that alerts workers that circuits and equipment have been locked out trip automatic opening (turning off) of a circuit by a GFCI or circuit breaker

voltage measure of electrical force

wire gauge wire size or diameter (technically, the cross-sectional area)

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