Free TN LLE Residential Wiring Questions and Answers

Question 1

What is the standard voltage for most residential electrical systems in the United States?

Accepted Answer

120/240 volts

Answer

110/220 volts

Answer

130/250 volts

Answer

140/260 volts

Question 2

What color wire is typically used for grounding in residential wiring?

Accepted Answer

Green or bare copper

Answer

Black

Answer

Red

Answer

White

Question 3

According to the National Electrical Code (NEC), how often should electrical outlets be placed in a residential home?

Accepted Answer

Every 6 feet

Answer

Every 8 feet

Answer

Every 10 feet

Answer

Every 12 feet

Question 4

What is the purpose of a Ground Fault Circuit Interrupter (GFCI) in residential wiring?

Accepted Answer

To protect against electrical shock

Answer

To prevent overloads

Answer

To increase voltage

Answer

To provide surge protection

Question 5

What is the minimum gauge of wire typically used for 20-amp circuits in residential wiring?

Accepted Answer

12-gauge

Answer

10-gauge

Answer

14-gauge

Answer

16-gauge