A newly installed personnel-protection device does not trip with its integral TEST control. What conclusion is justified?
- AThe equipment grounding conductor should be removed for the described C-10 installation and documented operating conditions
- BThe branch circuit is proven overloaded
- The protective function was not demonstrated and the device or circuit needs evaluation
- DReverse phase sequence is proven
Why C is correct
The best answer is: The protective function was not demonstrated and the device or circuit needs evaluation. Failure of the prescribed test means protection has not been verified; it does not by itself diagnose overload or phase sequence. The device and its supply/line-load connections should be evaluated. This transferred field condition tests the same installation or safety principle in a different project context. The other choices conflict with the cited rule, listing, safe-work process, or necessary diagnostic sequence.