E2 NEC Compliance 4

Question 1

NEC 410.116(B) requires fixtures installed in fire-rated ceilings to be marked with which designation?

Accepted Answer

IC-rated

Answer

Recessed luminaires installed in fire-rated assemblies must be IC-rated (Insulation Contact rated) and marked for installation in fire-rated ceilings.

Question 2

Under NEC 600.5, a sign or outline lighting system rated at 1200VA or less requires a branch circuit of at least what ampere rating?

Accepted Answer

20 amperes

Answer

NEC 600.5(A) requires each commercial occupancy sign to be supplied by a dedicated branch circuit rated at least 20 amperes.

Question 3

Per NEC 358.20, what is the minimum trade size for Electrical Metallic Tubing (EMT) permitted in commercial wiring?

Accepted Answer

1/2 inch

Answer

NEC 358.20 specifies that EMT is available in trade sizes 1/2 inch through 4 inches, making 1/2 inch the minimum permitted size.

Question 4

NEC 240.4(D) prohibits the use of overcurrent devices rated above 15 amperes to protect conductors of what size in commercial applications (copper)?

Accepted Answer

14 AWG

Answer

NEC 240.4(D) specifies that 14 AWG copper conductors must not be protected by overcurrent devices rated more than 15 amperes.

Question 5

According to NEC 215.2(A)(1), the minimum ampacity for feeder conductors must be the greater of the computed load or what percentage of continuous loads plus 100% of noncontinuous loads?

Accepted Answer

125%

Answer

Feeder conductors must be sized at 125% of the continuous load plus 100% of noncontinuous loads per NEC 215.2(A)(1).

(E2) E2 Commercial Electrical Inspector Practice Test

(E2) E2 Commercial Electrical Inspector Practice Test

E2 NEC Compliance 4