EVITP Electrical Safety and Codes — Questions and Answers
Question 1: What is arc flash risk during EV charger work?
- Explosive energy release from electrical fault causing burns and death (Correct answer)
- A camera flash effect
- A type of welding
- A circuit breaker feature
Correct answer: Explosive energy release from electrical fault causing burns and death
Arc flash produces extreme heat and pressure from an electrical fault.
Question 2: What PPE is needed for energized EV charging work?
- Arc-rated clothing, insulated gloves, safety glasses, voltage-rated tools (Correct answer)
- Standard work gloves only
- No special PPE
- Safety glasses only
Correct answer: Arc-rated clothing, insulated gloves, safety glasses, voltage-rated tools
Multiple layers of electrical-specific protection are required.
Question 3: What is lockout/tagout for EV installations?
- Ensuring circuits are de-energized and locked to prevent accidental energization (Correct answer)
- A security lock on the charger
- A wire connection method
- A software feature
Correct answer: Ensuring circuits are de-energized and locked to prevent accidental energization
LOTO physically prevents power from being restored during maintenance.
Question 4: What is a GFCI and why is it required for EV charging?
- Detects ground faults and disconnects power to prevent shock (Correct answer)
- Improves charging speed
- A type of breaker
- A grounding rod
Correct answer: Detects ground faults and disconnects power to prevent shock
GFCI protection detects current leakage and disconnects in milliseconds.
Question 5: What wire sizing factors apply to EV charging?
- Continuous load rating, voltage drop, ambient temperature, conduit fill (Correct answer)
- Any wire size works
- Only length matters
- Manufacturer decides only
Correct answer: Continuous load rating, voltage drop, ambient temperature, conduit fill
Multiple factors beyond just current draw affect wire sizing.
Question 6: What is the minimum circuit for a 40A Level 2 EVSE?
- 50A circuit with 6 AWG copper (Correct answer)
- 30A circuit
- 40A circuit exactly
- 20A circuit
Correct answer: 50A circuit with 6 AWG copper
125% continuous load rule requires 50A for a 40A EVSE.
EVITP Electrical Safety and Codes
What is arc flash risk during EV charger work?