I invite you to read my guide on wire color identification here. You may want to shut the power off just as a safety precaution before pulling the switches out of the box. This allows you to be able to compare the wire colors going to your switches and the wire colors that are in your light fixture. The best way to verify how your lighting circuit is wired is to pull the cover plates off all the switches involved and remove them from the boxes. Be sure to verify your wiring before assuming anything! Verifying Your Lighting Circuit The last is a common practice, but it is not a strict standard for electricians to use this color scheme. The red wire is going to the switch while the black wires are passing through taking power to a different location. The red wire is used to interconnect them. There used to be smoke detectors hooked in series.There may be 3-way switches in the circuit (Here is my full guide on wiring a 3-way switch).A ceiling fan with a light may have been in place before, and the light and the fan may have been controlled by two separate switches.When it comes to having a red wire in a light fixture box, it can mean a few different things: When working on electrical projects in your home, especially if it is an older home, you can run into many different scenarios. This is usually used for heavier lights, such as chandeliers and other hanging light fixtures.Red Wires In A Light Fixture Can Mean A Few Things If your fixture requires it, screw the threaded mounting rod into the center opening on the strap. The light fixture instructions may also give you guidance on the proper way to attach the mounting strap. Then, attach the mounting strap to the ceiling box, using whatever screw holes line up with the ceiling box. Position the strap against the base of the light fixture to determine which screw holes will be used to support the fixture. The strap also has a larger threaded hole in the center this is used if the light fixture is supported via a threaded mounting tube that screws into the strap. It will have several small threaded screw holes in it, some of which are used to attach the strap to the ceiling box, others which will be used to support the light fixture base. If your light fixture requires the use of a mounting strap (it usually does), first examine the strap included with the new light fixture. With heavier fixtures, a threaded mounting tube is screwed into a hole on the mounting strap, then the fixture base is threaded over the tube and secured with a screw-on knob. With other styles, a mounting strap is first attached to the ceiling box, then the fixture base is screwed to a mounting strap. Sometimes, it will be a simple matter of screwing the light fixture base directly to the ceiling box. This can vary, depending on the size and weight of the light fixture. Read the light fixture instructions to determine how your light fixture will be mounted to the ceiling box. Join the black wire leads together as well. If this is the case, join the white wires together with a wire connecter (usually included with the light fixture). If the light fixture has two or more lamp sockets, the black and white wires for each socket may not yet be connected together. Usually, it will have three wire leads: a black hot wire, a white neutral wire, and a green or bare copper ground wire. Remove the fixture base from the box and examine its wires. Remove the plastic bag containing the hardware and set it aside, as well. Carefully remove the glass shade and set it aside in a safe place. The Spruce Home Improvement Review Board.
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