NEC ELECTRIC 3

Question 1

A 20-ampere small-appliance branch circuit in a kitchen must use a minimum copper conductor size of:

Accepted Answer

12 AWG

Answer

A 20-amp circuit requires a minimum 12 AWG copper conductor.

Question 2

What is the maximum allowable voltage drop recommended by the NEC for a branch circuit?

Accepted Answer

3%

Answer

The NEC recommends a maximum 3% voltage drop on a branch circuit for reasonable efficiency.

Question 3

Which conductor must never be used as a current-carrying conductor under normal operation?

Accepted Answer

Equipment grounding conductor

Answer

The equipment grounding conductor carries current only during a fault, never under normal operation.

Question 4

Receptacles installed outdoors at a dwelling must be protected by:

Accepted Answer

GFCI and a weatherproof cover

Answer

Outdoor receptacles require GFCI protection and a weatherproof in-use cover.

Question 5

The grounding electrode conductor connects the service to the:

Accepted Answer

Grounding electrode (such as a ground rod)

Answer

The grounding electrode conductor bonds the system to the grounding electrode like a ground rod.

NEC Practice Test