NETA Safety Standards & Regulatory Compliance 2 — Questions and Answers
Question 1: According to NFPA 70E, what is the minimum arc flash boundary for a 480V system with an incident energy of 8 cal/cm²?
- The distance where incident energy equals 1.2 cal/cm² (Correct answer)
- The distance where incident energy equals 8 cal/cm²
- A fixed 4-foot boundary for all 480V systems
- The distance where incident energy equals 40 cal/cm²
Correct answer: The distance where incident energy equals 1.2 cal/cm²
The arc flash boundary is defined as the distance at which incident energy equals 1.2 cal/cm², the onset of a second-degree burn threshold.
Question 2: Under OSHA 29 CFR 1910.269, what minimum approach distance applies to qualified electrical workers working on energized conductors at 15 kV phase-to-phase?
- 6 inches
- 1 foot 5 inches
- 2 feet 2 inches (Correct answer)
- 3 feet 7 inches
Correct answer: 2 feet 2 inches
OSHA 1910.269 Table R-6 specifies a minimum approach distance of 2 feet 2 inches for phase-to-phase voltages between 15.1 kV and 17.5 kV.
Question 3: Which NETA standard specifically governs acceptance testing procedures for new electrical equipment installations?
- ANSI/NETA MTS
- ANSI/NETA ATS (Correct answer)
- ANSI/NETA ECS
- ANSI/NETA STVI
Correct answer: ANSI/NETA ATS
ANSI/NETA ATS (Acceptance Testing Specifications) covers testing and commissioning of new electrical equipment and installations.
Question 4: When performing insulation resistance testing, NETA standards require that test results be corrected to which standard temperature?
- 20°C
- 25°C (Correct answer)
- 40°C
- 60°C
Correct answer: 25°C
NETA standards require insulation resistance test results to be temperature-corrected to a standard reference temperature of 20°C (68°F).
Question 5: Under NFPA 70E, which PPE category is required when the incident energy is determined to be 12 cal/cm²?
- PPE Category 1
- PPE Category 2
- PPE Category 3 (Correct answer)
- PPE Category 4
Correct answer: PPE Category 3
PPE Category 3 covers incident energy levels from 12 to 40 cal/cm² and requires a minimum arc rating of 25 cal/cm² for clothing.
Question 6: Which regulatory body requires that electrical testing companies maintain documented proof that test technicians are qualified per NETA personnel certification standards?
- ANSI
- IEEE
- OSHA (Correct answer)
- EPA
Correct answer: OSHA
OSHA requires employers to ensure electrical workers are qualified, and referencing NETA certification provides documented evidence of qualification.
Question 7: A lockout/tagout procedure requires that after all energy sources are isolated, what must a technician verify before beginning work?
- Test the equipment for voltage with a proximity tester only
- Attempt to restart the equipment to confirm de-energization
- Verify zero energy state with an appropriately rated voltage-testing device (Correct answer)
- Have a supervisor verbally confirm the equipment is safe
Correct answer: Verify zero energy state with an appropriately rated voltage-testing device
OSHA LOTO procedures require verification of zero-energy state using a properly rated test instrument before work begins.
NETA Safety Standards & Regulatory Compliance 2
According to NFPA 70E, what is the minimum arc flash boundary for a 480V system with an incident energy of 8 cal/cm²?