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
A branch circuit in a commercial building supplies a continuous fluorescent lighting load of 24 amperes. The minimum overcurrent device rating must be:
Answer: 30 amperes
NEC 210.20(A) requires the overcurrent device to be rated at least 125% of the continuous load: 24A × 1.25 = 30A.
What NEC section addresses the minimum receptacle requirements for countertop surfaces in a dwelling unit kitchen?
Answer: 210.52(C)
NEC 210.52(C) specifies the placement and quantity of receptacles required for kitchen countertop surfaces.
A branch circuit tap made within a panelboard must comply with NEC tap rules. Which condition permits a tap conductor smaller than the feeder?
Answer: The tap is no longer than 25 feet and is no smaller than 1/3 the feeder ampacity
NEC 240.21(B)(2) permits a 25-foot tap rule when the tap conductor is at least 1/3 the ampacity of the feeder and terminates in a single breaker.
In a guest room of a hotel, GFCI protection is required for all:
Answer: 125-volt, 15- and 20-ampere receptacles
NEC 210.8(B)(2) requires GFCI protection for all 125-volt, 15- and 20-ampere receptacles in hotel and motel guest rooms.
What is the maximum distance allowed between the overcurrent protection and a tap conductor in the 10-foot tap rule?
Answer: 10 feet
NEC 240.21(B)(1) permits unprotected tap conductors up to 10 feet long when the tap conductor ampacity is not less than the combined loads supplied.
A branch circuit supplying a motor must have an ampacity of at least:
Answer: 125% of the motor full-load current
NEC 430.22(A) requires branch circuit conductors for a single motor to have an ampacity of at least 125% of the motor's full-load current rating.
Under NEC 210.52(B), receptacles in a dwelling unit must be installed in every kitchen countertop space that is at least how wide?
Answer: 12 inches
NEC 210.52(C)(1) requires a receptacle outlet for every countertop space 12 inches or wider in a dwelling unit kitchen.