Electrical Safety and Personal Protective Equipment Flashcards
7 cards from real 309A practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Electrical Safety and Personal Protective Equipment flashcards as text
What is the flash protection boundary in arc flash safety?
Answer: The distance at which a worker would receive a second-degree burn without arc-rated PPE
The flash protection boundary is the distance from an arc source at which an unprotected worker would receive a second-degree burn, requiring arc-rated FR clothing inside this boundary.
According to the CEC, how must a grounding conductor be identified in a Canadian electrical installation?
Answer: Green insulation, green with yellow stripe, or bare copper
The CEC requires grounding conductors to be identified by green insulation, green insulation with a yellow stripe, or bare copper conductor.
What is WHMIS and why is it relevant to electricians?
Answer: Workplace Hazardous Materials Information System; provides safety data for chemicals used in electrical work
WHMIS is Canada's system for communicating hazard information about controlled products, including chemicals like solvents, lubricants, and cleaning agents commonly used by electricians.
What is the purpose of a safety interlock on electrical equipment enclosures?
Answer: To prevent equipment from being energized while access panels are open
Safety interlocks automatically de-energize equipment when access doors or panels are opened, preventing workers from contacting live components during inspection or maintenance.
At what incident energy level is the threshold typically established for requiring arc-rated PPE?
Answer: 1.2 cal/cm²
An incident energy of 1.2 cal/cm² represents the onset of a second-degree burn on unprotected skin, establishing the minimum threshold that triggers arc-rated PPE requirements.
Under Canadian occupational health and safety regulations, what qualifies a person as 'competent' for electrical work?
Answer: Being qualified by knowledge, training, or experience to perform the assigned work safely
Canadian OHS regulations define a competent person as someone qualified by knowledge, training, or experience to perform specific work safely, which may include apprentices under appropriate supervision.
Which PPE item is specifically designed to protect against arc blast pressure waves and intense radiant heat?
Answer: Arc-rated face shield or arc flash hood
Arc-rated face shields and arc flash hoods are engineered to shield the face and head from the intense heat, blinding light, and pressure wave produced during an arc blast.