Practice safe measurement techniques by always connecting the grounded lead first, hot second.

Practice safe measurement techniques by always connecting the grounded lead first, hot second.

• A. False
• B. Not sure
• C. True
• D. I don't know

Answer: (C)

Connecting the grounded lead first sets a safe, defined reference to ground before you bring the hot lead to a live point. This minimizes the risk of shock or arcing if your hand slips or if the other lead contacts something energized, because the measurement path is established through the ground first rather than creating a direct path from live to you. In practice, you typically attach the ground/COM probe first, then the voltage/hot probe, especially when dealing with higher voltages, and only energize after both probes are in place and the circuit is within the meter’s safe range.

Connecting the grounded lead first sets a safe, defined reference to ground before you bring the hot lead to a live point. This minimizes the risk of shock or arcing if your hand slips or if the other lead contacts something energized, because the measurement path is established through the ground first rather than creating a direct path from live to you. In practice, you typically attach the ground/COM probe first, then the voltage/hot probe, especially when dealing with higher voltages, and only energize after both probes are in place and the circuit is within the meter’s safe range.