Electrician Services and Distribution

Question 1

What is the minimum ampacity required for a service to a single-family dwelling per the NEC?

Accepted Answer

100 amps

Answer

60 amps

Answer

150 amps

Answer

200 amps

Question 2

What is the purpose of a main disconnect in a service entrance panel?

Accepted Answer

To provide a means to disconnect all power to the premises

Answer

To step down voltage from utility

Answer

To filter harmonics from the utility

Answer

To measure power consumption

Question 3

What is the difference between a service lateral and a service drop?

Accepted Answer

A lateral is underground; a drop is overhead

Answer

A lateral carries higher voltage than a drop

Answer

A lateral uses aluminum wire; a drop uses copper

Answer

There is no difference

Question 4

What is the maximum number of disconnecting means permitted at a service entrance per the NEC?

Accepted Answer

6

Answer

2

Answer

4

Answer

8

Question 5

What type of grounding electrode is considered the most effective?

Accepted Answer

Concrete-encased electrode (Ufer ground)

Answer

Ground rod

Answer

Metal underground water pipe

Answer

Building steel

Question 6

What is the minimum length for a ground rod?

Accepted Answer

8 feet

Answer

4 feet

Answer

6 feet

Answer

10 feet