Journeyman Electrician's Load Calculations 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 Load Calculations flashcards as text
Per NEC 220.53, what demand factor applies when four or more fixed appliances (excluding ranges, dryers, space heating, or A/C) are installed in a dwelling unit?
Answer: 75%
NEC 220.53 permits a 75% demand factor when four or more fixed appliances are installed in a dwelling unit.
Per NEC 220.14(I), what is the standard load per outlet for general-purpose receptacles in commercial occupancies?
Answer: 180 VA
NEC 220.14(I) assigns 180 VA per outlet for general-purpose receptacle outlets in commercial occupancies.
Per NEC 220.14(G), what is the minimum load per linear foot used for show window lighting in a commercial load calculation?
Answer: 200 VA
NEC 220.14(G) requires a minimum of 200 VA per linear foot for show window lighting loads.
What demand factor does NEC Table 220.42 assign to dwelling unit lighting loads between 3,001 VA and 120,000 VA?
Answer: 35%
NEC Table 220.42 assigns a 35% demand factor to dwelling unit lighting loads between 3,001 VA and 120,000 VA.
Per NEC 220.61(B)(1), what percentage is applied to calculate the neutral demand load for electric clothes dryers?
Answer: 70%
NEC 220.61(B)(1) requires the neutral load for dryers to be calculated at 70% of the feeder or service demand load.
Per NEC Table 220.12, what is the unit lighting load for a bank?
Answer: 3.5 VA/sq ft
NEC Table 220.12 lists banks at 3½ VA per square foot, one of the higher commercial occupancy lighting loads.
Per NEC 220.51, what percentage of the total connected load must be used for fixed electric space heating loads?
Answer: 100%
NEC 220.51 requires fixed electric space heating loads to be calculated at 100% of the total connected load with no demand reduction.