If a switching device has the marking CU ONLY on it, an electrician can use __________ wire with the device.

Question

Quizplus · Accepted Answer

The marking "CU ONLY" indicates that only copper wire should be used with the switching device. Using aluminum wire could cause compatibility issues and potentially lead to electrical hazards. Copper clad aluminum wire may also not be compatible as it is a combination of copper and aluminum.

If a Switching Device Has the Marking CU ONLY on It