![]() A light or lights can be controlled by more than one switch. Warning It is recommended to contact an electrical professional to take care of any of your wiring needs. In this configuration, the switches are called, confusingly, three-way switches. My question is if I can connect the water and gas lines to the grounded bus bar in the sub panel and use a single #4 copper conductor from the sub to the main to connect the ground, or if I have to individually connect the water line and the gas line directly to the main. How do I use 3-way switches and 4-way switches to control lights from two or more locations. Two light switches connected to the same power source can control a single light fixture too. I will have two GECs outside near the meter that will feed into the main where they are bonded to the service neutral, but I am also required to bond the water and gas lines. I would do this by adding an exterior 200A main just below the meter and feeding a sub panel via a conduit run through the conditioned crawlspace. Rather than replace the current conduit (50% of which is under a patio) I would like to run through my conditioned crawlspace to the same panel location. ![]() I am upgrading to 200A and I have to increase the conduit size. ![]() My current main panel is fed from a burried conduit run that goes 20ft around the outside of my house from the service drop. I saw from the sub-panel diagram sticky a similar setup to what I would like to do, but not exactly the same. Two way switches are used when there are two switches controlling one light, or more accurately one lighting circuit there can be more than one light fitting.
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