All metallic conductors must be tested with a meter to verify that there are no stray voltages between the conductors and ground that exceed how many volt(s) ac/dc?

• A. 0.5
• B. 1
• C. 2
• D. 5

Answer: (B)

Measuring stray voltage on metal surfaces relative to ground is about making sure bonding is solid and leakage paths aren’t creating a hazardous or nuisance condition. You’d test between each metallic conductor or enclosure and the equipment grounding conductor, checking both AC and DC readings. The limit you’re aiming for is no more than one volt in either AC or DC. If a reading exceeds one volt, investigate and correct bonding and grounding, inspect for damaged insulation, leakage paths, or other sources of stray voltage to reduce it to or below that threshold. This small margin helps prevent shock potential and nuisance alarms while keeping the system properly bonded.