Journeyman Electrician's Branch Circuits Flashcards
7 cards from real Journeyman Electrician’s Exam practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Journeyman Electrician's Branch Circuits flashcards as text
When sizing a branch circuit conductor for a continuous load, the conductor must be sized for at least:
Answer: 125% of the continuous load plus 100% of non-continuous load
NEC 210.19(A)(1) requires conductors to be sized for 125% of the continuous load plus 100% of non-continuous load.
Which of the following loads qualifies as a 'continuous load' per the NEC?
Answer: A load energized for 3 or more hours
NEC Article 100 defines a continuous load as one expected to continue for three or more hours.
A branch circuit that supplies two or more outlets or receptacles is classified as:
Answer: A general-purpose branch circuit
NEC Article 100 defines a general-purpose branch circuit as one that supplies two or more receptacles or outlets for lighting and appliances.
A 240-volt branch circuit to a central air conditioner rated 28 amperes must be protected by an overcurrent device rated no more than:
Answer: 30 amperes
For motor-compressor loads, the branch circuit overcurrent protection must not exceed the rating specified on the equipment nameplate, typically the next standard size above 28A is 30A.
What is the maximum voltage between conductors permitted for branch circuits supplying receptacles in dwelling units?
Answer: 150 volts
NEC 210.6(A) limits branch circuit voltage to 150 volts to ground for dwelling unit receptacles used for general lighting and appliances.
The laundry branch circuit in a dwelling unit must be rated at least:
Answer: 20 amperes
NEC 210.11(C)(2) requires at least one 20-ampere branch circuit for laundry receptacle outlets in a dwelling unit.
When a multiwire branch circuit feeds a device that could simultaneously interrupt both hot conductors, the NEC requires:
Answer: A handle-tied or two-pole breaker
NEC 210.4(B) requires multiwire branch circuits to have a means to simultaneously open all ungrounded conductors, such as a handle-tied or two-pole breaker.