Licensed Electrical Contractor Services, Feeders, and Branch Circuits 4

Question 1

Under NEC 230.82, which of the following may NOT be connected to the supply side of the service disconnecting means?

Accepted Answer

Branch circuit panelboard

Answer

A branch circuit panelboard is a load-side device and is not permitted on the supply side of the service disconnect per NEC 230.82.

Question 2

What is the maximum voltage permitted between conductors of a branch circuit supplying receptacles in guest rooms of a hotel?

Accepted Answer

150 volts

Answer

NEC 210.6(A) limits branch circuit voltage to a maximum of 150 volts to ground for receptacles in guest rooms.

Question 3

Per NEC 220.12, the general lighting load for an office building is calculated at what volt-amperes per square foot?

Accepted Answer

2.0 VA/sq ft

Answer

NEC Table 220.12 specifies a unit load of 3.5 VA per square foot for office occupancies.

Question 4

When service conductors are installed as open conductors on a building exterior, the minimum clearance from windows that can be opened is:

Accepted Answer

3 feet

Answer

NEC 230.9(A) requires open service conductors to maintain a minimum clearance of 3 feet from windows that open.

Question 5

A feeder tap is permitted without overcurrent protection at the tap point if it is no longer than 10 feet and:

Accepted Answer

Both A and C

Answer

NEC 240.21(B)(1) requires 10-foot taps to terminate in a single OCPD and be enclosed in a raceway.

Licensed Electrical Contractor Practice Test