Installation Best Practices Flashcards

Per NEC 625.40, how must each outlet installed for EV charging be supplied?

Answer: By an individual branch circuit with no other outlets

NEC 625.40 requires an individual branch circuit for each EV charging outlet.

A homeowner wants a NEMA 14-50 receptacle in the garage for EV charging. What protection does the 2020/2023 NEC require for this receptacle?

Answer: GFCI protection for personnel

NEC 625.54 requires GFCI protection for personnel on all receptacles installed for EV charging.

What listing standard is commonly referenced for AC Level 2 EVSE in the United States?

Answer: UL 2594

UL 2594 covers electric vehicle supply equipment, while UL 2202 covers EV charging system equipment such as DC chargers.

A 75 A circuit uses equipment with terminals not marked for a temperature rating. Which ampacity column should the installer use for conductor sizing per NEC 110.14(C)?

Answer: 60°C column

For circuits 100 A or less with unmarked terminals, conductor ampacity is based on the 60°C column.

When planning a commercial EVSE site, which step should occur earliest to avoid costly redesign?

Answer: Performing a site assessment including available capacity and utility coordination

Early site assessment and utility coordination confirm capacity, service requirements, and layout before design is finalized.

To meet accessibility guidelines, controls and the connector on an accessible EVSE should generally be within what unobstructed reach range above the ground?

Answer: 15 to 48 inches

ADA unobstructed reach range is 15 to 48 inches above the finished surface.

A raceway for an EVSE feeder will contain four current-carrying conductors plus a ground. What maximum conduit fill percentage applies per NEC Chapter 9, Table 1?

Answer: 40%

Raceways with more than two conductors are limited to 40% fill.