EVITP Electrical Safety and Codes 5

Question 1

Before working on an EVSE branch circuit, what is the correct way to verify absence of voltage under NFPA 70E?

Accepted Answer

Test the meter on a known live source, test the circuit, then retest the meter on the known source

Answer

NFPA 70E requires verifying the tester works before and after testing, often called the live-dead-live method.

Question 2

Which OSHA standard governs lockout/tagout for hazardous energy control in general industry?

Accepted Answer

29 CFR 1910.147

Answer

29 CFR 1910.147 is OSHA's Control of Hazardous Energy (lockout/tagout) standard.

Question 3

Under NFPA 70E, the arc flash boundary is the distance at which incident energy equals what value?

Accepted Answer

1.2 cal/cm²

Answer

The arc flash boundary is where incident energy reaches 1.2 cal/cm², the onset of a second-degree burn.

Question 4

NFPA 70E PPE Category 2 requires arc-rated clothing with a minimum arc rating of what?

Accepted Answer

8 cal/cm²

Answer

Category 2 requires a minimum arc rating of 8 cal/cm².

Question 5

Per NEC Table 300.5, what is the minimum cover depth for Schedule 80 PVC conduit feeding a parking lot EV pedestal (not under a building or roadway)?

Accepted Answer

18 in.

Answer

Nonmetallic raceways listed for direct burial need at least 18 in. of cover in general locations.

(EVITP) Electric Vehicle Infrastructure Program Practice Test