CSP question for October 27, 2026

CSP Domain 1: Advanced Application of Safety Principles

A technician must replace a sensor on a control circuit that runs at 24 volts to ground. The circuit cannot cause burns or an arc blast, and the work adds no explosion risk. A coworker says the circuit must be shut off and de-energized before any work starts. What is the correct response under the electrical safety-related work practices standard?

1. AThe circuit must be de-energized, because the exemption applies only to live parts operating at less than 12 volts to ground with no added burn or arc risk.
2. BThe circuit need not be de-energized, because it is under 50 volts to ground and the work adds no increased exposure to burns or arc explosion.
3. CThe circuit must be de-energized, because the exemption applies only when a supervisor signs a written waiver for each task before the work begins.
4. DThe circuit need not be de-energized, because it is under 50 volts to ground, even if the work would increase exposure to burns or arc explosion.