Electrical Flashcards
7 cards from real NEC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Electrical flashcards as text
What is the maximum spacing between countertop receptacles along a dwelling kitchen counter?
Answer: 48 inches
NEC 210.52(C) requires receptacles so no point along the counter is more than 24 inches from one, yielding 48-inch maximum spacing.
What ampacity does an 8 AWG copper THHN conductor have at 75°C?
Answer: 50 amps
Per NEC Table 310.16, 8 AWG copper at the 75°C column is rated 50 amps.
Which NEC article covers wiring methods for hazardous (classified) locations?
Answer: Article 500
NEC Article 500 governs classification and wiring of hazardous (classified) locations.
What is the minimum burial depth for a residential 120-volt circuit using direct-buried UF cable with GFCI protection at 20 amps or less?
Answer: 12 inches
NEC Table 300.5 permits 12 inches of cover for GFCI-protected residential branch circuits of 20 amps or less.
A continuous load must be calculated at what percentage of its value for conductor and overcurrent sizing?
Answer: 125%
NEC 210.20(A) requires sizing at 125% of a continuous load.
What device disconnects a circuit automatically when it detects an arcing fault?
Answer: AFCI
An AFCI (Arc-Fault Circuit Interrupter) detects dangerous arcing and opens the circuit per NEC 210.12.
What is the minimum working space depth in front of 120/240-volt equipment likely to be examined while energized (Condition 1)?
Answer: 3 feet
NEC Table 110.26(A)(1) requires a minimum 3-foot working clearance for 0–150V Condition 1.