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

UL Listed

Answer

AT (Airtight)

Answer

Listed for Through-Ceiling Penetration

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

15 amperes

Answer

30 amperes

Answer

40 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

3/8 inch

Answer

1/4 inch

Answer

3/4 inch

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

12 AWG

Answer

10 AWG

Answer

8 AWG

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

100%

Answer

115%

Answer

150%

Question 6

NEC 344.10 lists where Rigid Metal Conduit (RMC) is permitted. Which environment is specifically where RMC is permitted but IMC generally is NOT without additional protection?

Accepted Answer

Concrete encasement in direct contact with the earth

Answer

Dry, indoor locations

Answer

Above suspended ceilings

Answer

In cable trays

Question 7

Under NEC 800.113, communications cables installed in commercial buildings in spaces used for environmental air handling must be:

Accepted Answer

Plenum-rated (CMP)

Answer

Riser-rated (CMR)

Answer

General-purpose (CM)

Answer

Conduit-only with no cable jacketing requirement