Question

The purpose behind permitting the grounding electrode connection to be made at the equipment grounding conductor terminal bar of the service rather than to the neutral is to provide a convenient connection point sometimes outside the service disconnecting means enclosure.

a. True

b. False

If the electrical system is grounded at the utility supply transformer, it is _ that the grounded conductor be run to and be connected to the service disconnected

a. optional, based on the design of the electrical engineer

b. mandatory, based on NEC rules in Article 250,

The minimum size of the grounded service entrance conductor is

a. not smaller than the size of the grounding electrode

b. optional based on the design of the electrical engineer

The minimum size of the grounded conductor for a 3 phase, 3 wire corner grounded, delta connected service is

a. not smaller than the required grounding electrode conductor

b. not smaller than a neutral for a 3 phase, wye connected system or the same ampacity

c. not smaller than the ungrounded service conductors

d. not specified as a grounded conductor is not required

Answer 1