Installation Best Practices Flashcards

Before working inside an existing panel to add an EVSE breaker, what is the required first safety step under NFPA 70E?

Answer: Establish an electrically safe work condition, including lockout/tagout and verifying absence of voltage

NFPA 70E requires establishing an electrically safe work condition before working on equipment.

Without a listed cable management system, what is the maximum overall cord length typically permitted for EVSE by NEC 625.17?

Answer: 25 ft

NEC 625.17 limits EVSE output cable length to 25 ft unless a cable management system is used.

Why is a cable management system or retractor recommended at public EVSE locations?

Answer: It keeps the cable off the ground, reducing trip hazards and cable damage

Cable management prevents cords from lying on the ground where they can be driven over or tripped on.

An outdoor 240 V receptacle for EV charging is installed in a wet location. What type of cover is required per NEC 406.9(B)?

Answer: An extra-duty, weatherproof in-use cover

Receptacles in wet locations must have an enclosure that is weatherproof whether or not a plug is inserted, listed extra-duty.

Under the 2023 NEC 220.57, what is the minimum load used for EVSE in a load calculation?

Answer: 7,200 W or nameplate, whichever is larger

NEC 220.57 calculates EVSE load at 7,200 W or the nameplate rating, whichever is larger.

After installing a networked EVSE, which commissioning activity best confirms the installation is ready for customer use?

Answer: Verifying firmware, network communication, and a successful test charge session

Commissioning verifies firmware, connectivity, and actual charging operation before handover.

A DC fast charger pedestal is mounted on a new concrete pad. What best practice applies to anchoring?

Answer: Use anchors and pad dimensions specified by the manufacturer and engineered drawings

Manufacturer and engineered specifications ensure the pedestal resists impact, wind, and seismic loads.