NECA Electrical Code & Standards 2

Question 1

Under the NEC, what is the minimum burial depth for a residential branch circuit rated 120V GFCI-protected installed in rigid metal conduit (RMC)?

Accepted Answer

6 inches

Answer

NEC Table 300.5 allows RMC burial at 6 inches for 120V GFCI-protected residential branch circuits.

Question 2

Which NEC article governs the installation of electrical systems in hazardous (classified) locations using Zone equipment designation?

Accepted Answer

Article 505

Answer

NEC Article 505 covers Class I Zone 0, Zone 1, and Zone 2 hazardous locations using the IEC Zone system.

Question 3

According to NEC 210.52, how many small-appliance branch circuits are required for kitchen countertop receptacles in a dwelling unit?

Accepted Answer

At least two 20-amp circuits

Answer

NEC 210.52(B)(1) requires at least two 20-amp small-appliance branch circuits for countertop receptacles in the kitchen.

Question 4

What is the maximum distance from a water heater that a disconnect means must be located per NEC 422.31(B)?

Accepted Answer

In sight from the appliance

Answer

NEC 422.31(B) requires a disconnecting means within sight of the water heater unless it is lockable in the open position.

Question 5

Per NEC 230.24(B), service-entrance conductors must maintain a minimum clearance of how many feet above a residential roof with a slope of 4 in 12 or greater?

Accepted Answer

3 feet

Answer

NEC 230.24(B)(1) allows a 3-foot clearance above a roof with a slope of 4 in 12 or greater.

(NECA) National Electrical Contractors Association Practice Test

(NECA) National Electrical Contractors Association Practice Test

NECA Electrical Code & Standards 2