General NEC Requirements Flashcards

Per NEC 230.70, where must the service disconnecting means be located?

Answer: At the nearest point of entrance of the service conductors, readily accessible inside or outside the building

NEC 230.70(A)(1) requires the service disconnect to be installed at a readily accessible location nearest the point of entrance of the service conductors.

What does NEC 300.4(A)(1) require when NM cable passes through bored holes in wood framing members?

Answer: The hole must be at least 1.25 inches from the nearest edge of the wood member, or a steel nail plate must be used

NEC 300.4(A)(1) requires bored holes to be at least 1-1/4 inches from the nearest edge of the wood member. If this distance cannot be maintained, a 1/16-inch steel plate must protect the cable.

Per NEC 250.52, which of the following qualifies as a grounding electrode?

Answer: A 10-foot metal water pipe in direct contact with the earth

NEC 250.52(A)(1) recognizes a metal underground water pipe in direct contact with the earth for 10 feet or more as a grounding electrode.

What is the minimum burial depth for PVC conduit with GFCI protection installed under a residential lawn per NEC Table 300.5?

Answer: 12 inches

NEC Table 300.5 allows PVC conduit to be buried at a minimum of 12 inches under residential property when GFCI protection is provided.

Per NEC 210.8(F), GFCI protection is required for dishwasher branch circuits in dwelling units. What is the voltage and ampere range?

Answer: 120V through 250V, 50A or less

NEC 210.8(F) requires GFCI protection for dishwasher branch circuits rated 125V through 250V, 50 amperes or less in dwelling units.

What NEC article covers the requirements for swimming pool, fountain, and similar installation wiring?

Answer: Article 680

NEC Article 680 covers swimming pools, fountains, hot tubs, spas, and similar installations with specific wiring and bonding requirements.