A DIYer by nature, Deziel regularly shares tips and tricks for a better home and garden at Hunker.com. Double gang switch face plate. Usually the correct circuit is labeled, but if it is not you should turn off all the power in order to be safe. The device or outlet box must be connected to the ground wire if it is a metal box and to a plastic device box if there is a ground screw and grounding strap as an integral part of the box. I have installed another light with a shacked switch, but I cannot get the new light to work. To create this article, volunteer authors worked to edit and improve it over time. wikiHow is a “wiki,” similar to Wikipedia, which means that many of our articles are co-written by multiple authors. The double pole or 2-pole switch is essentially two single pole switches operated by one toggle. How do I wire a double switch if there is only 1 black wire, 1 white wire, and a ground coming from my fan and light? The only difference is that a cable that connects the two electrical boxes replaces one of the 6-inch jumper wires in the pigtail.Make the pigtail in the box into which the line cable enters, or Box 1. The ground wire, on the other hand, must connect to both switches, and the easiest way to do this is to make a pigtail as you did with the hot wires.The procedure for hooking up two switches that aren't in the same electrical box is basically the same. It's common to power two or more light switches from a single power supply, and the switches can be in the same electrical box or different parts of the house.