AWS Certified Welding Inspector — FundamentalsSafetyMedium
A welding inspector notices a welder operating an arc welding machine with a frayed and exposed power cord. The ground fault circuit interrupter (GFCI) for the circuit is known to be non-functional. What is the MOST immediate and severe electrical hazard presented by this situation?
- AOverheating of the power cord leading to a fire.
- BDamage to the welding machine's internal components.
- CElectrocution due to direct contact with live conductors.
- DVoltage fluctuations affecting weld quality.
Show answer & explanationAnswer & explanation
Correct answer: C. Electrocution due to direct contact with live conductors.
A frayed power cord with exposed conductors, combined with a non-functional GFCI, creates an extremely high risk of electrocution. Direct contact with live conductors can send lethal current through the body, especially without the GFCI to rapidly cut power in case of a ground fault.
Why the other options are wrong
- A. Overheating is a hazard, but electrocution from direct contact with exposed wires is more immediate and severe without GFCI protection.
- B. Damage to internal components is possible but less immediate or severe than the direct threat to life.
- D. Voltage fluctuations affect weld quality but are not an immediate life-threatening hazard compared to electrocution.
GFCI Protection
A Ground Fault Circuit Interrupter (GFCI) rapidly detects current leakage to ground and trips the circuit, preventing electrocution, especially crucial with damaged cords.
- Detects ground faults (current leakage).
- Trips circuit rapidly to prevent shock.
- Essential safety device in wet/hazardous environments.
Memory trick: Frayed wires and no GFCI, a deadly shock is standing by.