Does pressing a control-system STOP pushbutton normally establish an electrically safe work condition?
- AYes; every STOP button is a disconnect
- BYes; if the pilot light goes dark
- No; isolate, lock out, and verify de-energization
- DNo; because equipment can never be de-energized
Why C is correct
A control command can fail or leave line-side and stored energy present. Safe electrical work requires identifying and isolating sources and verifying the condition; a pushbutton or indicator is not normally an isolating means.