CSLB C-46 Solar ContractorSafetyEasy
An electrical worker is about to install a new solar inverter in a commercial setting. The work involves connecting to an existing energized panel. Which of the following is the primary purpose of wearing arc-rated clothing?
- ATo provide insulation from high-voltage direct current (DC) sources.
- BTo prevent electric shock from touching live conductors.
- CTo protect against the thermal effects of an arc flash incident.
- DTo shield the worker from electromagnetic interference.
Show answer & explanationAnswer & explanation
Correct answer: C. To protect against the thermal effects of an arc flash incident.
Arc-rated clothing is specifically designed to protect workers from the extreme heat and radiant energy produced during an arc flash event, mitigating severe burns.
Why the other options are wrong
- A. While some arc-rated clothing might offer minimal insulation, its primary purpose is not electrical insulation from voltage.
- B. Arc-rated clothing does not primarily prevent electric shock; insulated gloves and tools do that.
- D. Arc-rated clothing does not shield against electromagnetic interference.
Arc-Rated Clothing Purpose
Arc-rated (AR) clothing is Personal Protective Equipment (PPE) designed to protect workers from the thermal hazards of an electric arc flash.
- Protects against intense heat and radiant energy.
- Reduces burn injury severity.
- Rated by Arc Thermal Performance Value (ATPV) or Energy Breakopen Threshold (EBT).
Memory trick: Arc flash heat, AR clothes can beat.