Grounding and bonding

Where a separate building is supplied by a feeder, the NEC requires a grounding electrode or grounding electrode system:

• in accordance with Part I of Article 250.

• in accordance with Part II of Article 250.

• in accordance with Part III of Article 250.

• in accordance with Part X of Article 250.

Based on the NEC, that which is built or constructed, other than equipment, best defines a   ?

• structure

• pole-mounted sign

• building

• power outlet at an RV park

Which part includes the provisions that require system grounding, permit system grounding, & prohibit system grounding?

• Part I

• Part II

• Part IV

• Part III

If an electrical system is grounded,   ?   conductor(s) of the system is connected to the Earth.

• 1

• 2

• 4

• 3

A high-impedance grounded neutral system is   ?   provided with ground detection.

• prohibited from being

• required to be

• permitted to be

• not required to be

When are 3-phase, 4-wire, wye-connected & the neutral is used as a circuit conductor, the system is ? grounded.

• not required to be

• required to be

• permitted to be

• restricted from being

Connected to ground without inserting any resistor or impedance device best defines which of the following systems?

• Reference grounded system

• High-impedance grounded system

• Solidly grounded system

• Reactance grounded system

A 240-volt, single-phase, 2-wire system is   ?   grounded.

• not permitted to be

• not required to be

• restricted from being

• required to be

When used exclusively to supply industrial electric furnaces for melting, refining, tempering:

• the system is required to be grounded

• the system is not permitted to be grounded

• the system is not required to be grounded

• the system is restricted from being grounded

A 480-volt, 3-phase, 3-wire system is   ?   grounded.

• not required to be

• required to be

• not permitted to be

• restricted from being