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Exam of 1 pages for the course IEC at IEC (IEC practice)
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IEC practiceElectrical systems that are grounded shall be connected to earth in a manner that will
limit the voltage imposed by________________ - answer line surges, lightning,
unintentional contact with higher-voltage lines
The primary purpose of grounding metal equipment enclosures and metal raceways to
the grounding electrode system is to___________ - answer keep all metal parts at the
same voltage / limit voltage surges
Providing a low impedance ground return path_________ when a ground-fault occurs. -
answer permits a high current to flow
in a run of conduit, when couplings and connectors are loose this will _________ the
amount of time required for a circuit breaker to open when a ground fault occurs. -
answer increase
in a run of conduit, when couplings and connectors are loose this will _________ the
amount of time required for a circuit breaker to open when a short circuit occurs. -
answerhave no effect on
in commercial repair garages where electrical diagnostic equipment, electrical hand
tools, or portable lighting equipment is used, GFCI protection is required for
all___________ receptacles - answer125 volt, single phase, 15 and 20 ampere/ 250
volt, single phase, 30 ampere/ 250 volt, three phase, 15 and 20 ampere
In commercial garage, what type of service would qualify it as a major repair garage? -
answerpainting
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