Question

Electrical systems that are permitted to be installed as ungrounded are usually not grounded so the first ground fault on the system will not result in operation of an over current device.

a. True

b. False

Ungrounded electrical systems with conductors installed in grounded metal raceways and enclosures

a. have no voltage to ground

b. have an approximate half system voltage to ground

c. present no shock hazard to personnel

d. cannot become grounded as there is no connection to the ground rod.

The owner of the premises can choose whether the following circuits are grounded or remain ungrounded: a crane that operates over combustible fibers, circuits in inhalation anesthetizing locations of hospitals, and 15 volt circuits for swimming pool lighting derived from a transformer.

a. True.

b. False

Rather than making a grounding connection in each service disconnecting means for services that are double ended, it is permitted to make a single grounding electrode connection at th3 tie point for the services

a. True

b. False

Answer 1