Services, Feeders, and Branch Circuits Flashcards
7 cards from real Licensed Electrical Contractor practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Services, Feeders, and Branch Circuits flashcards as text
Under NEC 230.82, which of the following may NOT be connected to the supply side of the service disconnecting means?
Answer: Branch circuit panelboard
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.
What is the maximum voltage permitted between conductors of a branch circuit supplying receptacles in guest rooms of a hotel?
Answer: 150 volts
NEC 210.6(A) limits branch circuit voltage to a maximum of 150 volts to ground for receptacles in guest rooms.
Per NEC 220.12, the general lighting load for an office building is calculated at what volt-amperes per square foot?
Answer: 2.0 VA/sq ft
NEC Table 220.12 specifies a unit load of 3.5 VA per square foot for office occupancies.
When service conductors are installed as open conductors on a building exterior, the minimum clearance from windows that can be opened is:
Answer: 3 feet
NEC 230.9(A) requires open service conductors to maintain a minimum clearance of 3 feet from windows that open.
A feeder tap is permitted without overcurrent protection at the tap point if it is no longer than 10 feet and:
Answer: Both A and C
NEC 240.21(B)(1) requires 10-foot taps to terminate in a single OCPD and be enclosed in a raceway.
Per NEC 210.52, how many small-appliance branch circuits are required in the kitchen of a dwelling unit?
Answer: At least two 20-ampere circuits
NEC 210.52(B)(1) requires a minimum of two 20-ampere small-appliance branch circuits in dwelling unit kitchens.
Which of the following service disconnect locations is preferred per NEC 230.70?
Answer: Outside the building or nearest to the point of entrance
NEC 230.70(A)(1) requires the service disconnecting means to be installed outside the building or inside nearest the point of conductor entry.