NETA Safety Standards & Regulatory Compliance 3 — Questions and Answers
Question 1: NETA's ANSI/NETA MTS requires maintenance testing frequency based primarily on what factor?
- Equipment manufacturer recommendations only
- Equipment condition, environment, and criticality (Correct answer)
- Age of the equipment in years
- Local utility requirements
Correct answer: Equipment condition, environment, and criticality
ANSI/NETA MTS bases maintenance intervals on a condition-based approach considering equipment condition, operating environment, and criticality to operations.
Question 2: According to NFPA 70E, before an electrical worker can work within the restricted approach boundary of energized conductors, what must be completed?
- Only verbal authorization from a supervisor
- An energized electrical work permit must be issued and approved (Correct answer)
- A standard maintenance work order is sufficient
- Written notification to the local utility company
Correct answer: An energized electrical work permit must be issued and approved
NFPA 70E requires an energized electrical work permit (EEWP) to be issued and approved before work within the restricted approach boundary of energized parts.
Question 3: Under IEEE Standard 80, the tolerable touch voltage for a person weighing 50 kg for a fault duration of 0.5 seconds is approximately:
- 50 volts
- 116 volts (Correct answer)
- 157 volts
- 400 volts
Correct answer: 116 volts
IEEE Std 80 defines tolerable touch voltage as approximately 116 volts for a 50 kg person at a 0.5-second fault clearing time.
Question 4: Which document type must NETA-certified technicians produce to demonstrate compliance with ANSI/NETA testing standards?
- A verbal field report given to the client supervisor
- Standardized test report forms documenting all required tests and results (Correct answer)
- A simple pass/fail checklist submitted by email
- A utility-approved inspection certificate
Correct answer: Standardized test report forms documenting all required tests and results
NETA standards require detailed written test reports using standardized forms that document all required tests, equipment data, and results.
Question 5: When NETA standards specify a 'trip test' for a circuit breaker, what is the primary safety concern being verified?
- Breaker can be manually operated without tools
- Breaker will open within manufacturer-specified time under overcurrent conditions (Correct answer)
- Breaker contact resistance is within tolerance
- Breaker enclosure integrity is maintained during operation
Correct answer: Breaker will open within manufacturer-specified time under overcurrent conditions
Trip testing verifies that the circuit breaker will open within the manufacturer's specified time-current curves under overcurrent fault conditions.
Question 6: According to OSHA 1910.147, which energy source type is NOT covered under the standard lockout/tagout requirements?
- Electrical energy
- Hydraulic energy
- Thermal energy
- Electrical energy on utility power lines covered by 1910.269 (Correct answer)
Correct answer: Electrical energy on utility power lines covered by 1910.269
OSHA 1910.147 covers most energy sources but excludes electrical energy controlled under 1910.269 (electric power generation, transmission, and distribution) and other specific utility operations.
Question 7: NFPA 70E requires an arc flash hazard analysis to be updated whenever what condition occurs?
- Any technician receives new PPE
- A major modification to the electrical system is made (Correct answer)
- Annual calendar review regardless of system changes
- Whenever any equipment maintenance is performed
Correct answer: A major modification to the electrical system is made
NFPA 70E requires the arc flash hazard analysis to be reviewed and updated when a major modification or renovation is made to the electrical distribution system.
NETA Safety Standards & Regulatory Compliance 3
NETA's ANSI/NETA MTS requires maintenance testing frequency based primarily on what factor?