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
Per NEC 230.71, the maximum number of disconnects permitted for a single service is:
Answer: 6
NEC 230.71(A) permits a maximum of six disconnecting means for a service.
A feeder supplying a continuous load must have its overcurrent protection device rated at no less than:
Answer: 125% of the continuous load
NEC 215.3 requires feeder OCPD ratings to be at least 125% of the continuous load.
What is the minimum clearance required above a residential roof for service-entrance conductors with a slope greater than 4 inches in 12 inches?
Answer: 18 inches
NEC 230.24(A) Exception allows 18-inch clearance above roofs with a slope of 4:12 or greater.
Which NEC article covers the installation of feeders?
Answer: Article 215
Article 215 covers feeder installation requirements.
Per NEC 210.19, the minimum ampacity of branch circuit conductors must be at least what percentage of the continuous load plus the non-continuous load?
Answer: 125% of continuous plus 100% non-continuous
NEC 210.19(A)(1) requires conductors rated at 125% of the continuous load plus 100% of the non-continuous load.
Service conductors supplying a one-family dwelling must have an ampacity of at least:
Answer: 100 amperes
NEC 230.79(C) requires a minimum 100-ampere service for one-family dwellings.
A 20-ampere branch circuit is permitted to serve receptacles with a maximum rating of:
Answer: 20 amperes
NEC 210.21(B)(1) permits single receptacles on a 20-ampere circuit to be rated 20 amperes.