While electrical boxes have many variations, they all fall into one of two categories: plastic boxes or metal boxes.

When you think of electrical equipment, you probably think of appliances and tools — things you plug in and use. You're right. But with grounding, the term also includes metal appliance frames, ...

Grounding bars and grounding rods are electrical connections that divert undesirable current ... and structures. Examples include metal pipes, metal frames, and reinforcing bar (rebar) used in ...

In general, when someone speaks of ground ... metal and the ground. However, DC testers are not designed to test the integrity of the ground, only that there is one. Underwriters Laboratories (UL) ...