Which hazard cannot be completely protected against by standard protective measures?

• A. Lightning
• B. Induction
• C. Fault Current
• D. Capacitance

Answer: (A)

Lightning is a hazard you cannot completely protect against with standard protective measures. It’s a natural, unpredictable event that can deliver enormous energy in an instant, and no amount of PPE, insulation, or standard procedures can guarantee safety from a direct strike or nearby lightning activity. Protective practices like proper grounding, surge protection, and weather precautions can reduce risk, but they cannot eliminate it.

In contrast, induced voltages from nearby energized equipment, fault-current conditions, and energy stored in capacitance can be controlled more reliably through standard measures. Induction hazards are minimized by maintaining safe clearances, shielding, and proper isolation when possible. Fault current can be eliminated or dramatically reduced by de-energizing the circuit, using lockout/tagout, and relying on protective devices to interrupt current. Capacitance hazards, from stored energy in cables and equipment, are mitigated by discharging capacitors and ensuring energy sources are isolated before work.