When wiring the control box on subsequent occasions, what safety step is required?

• A. Turn off the main power before changing any wiring
• B. Leave power on and change wiring
• C. Only switch off at the breaker
• D. Use a non-contact tester and proceed

Answer: (A)

De-energize the system by turning off the main power before changing any wiring. This ensures no live voltage is present in the control box, protecting you from electric shock, short circuits, and arc flash. Turning off only the breaker can leave other parts energized or energy stored in capacitors, so it may not guarantee a safe working condition. A non-contact tester isn’t a reliable way to confirm de-energization in all parts of the circuitry. The safest approach is to use the main disconnect, apply lockout/tagout if available, and verify with a proper voltage tester before you proceed.