Here's how to swap outdated three-way light switches for something much better. Don't put up with old three-way light switches like this. Swap them out for something new and improved.
Even if you're not doing an electrical project, it's important to understand how the wiring in your home works. Here are the basics for installing and choosing combination switches. There's more to a light than just a flip of the switch.
It sucks to have to wrestle with shopping bags while trying to find your house key and unlock your door in the dark. You can buy regular non-smart bulbs, which tend to be more inexpensive. Installing a smart light switch is a one-time ordeal.
A double light switch is used to turn two separate light sources in one area on and off. The wiring in this case is pretty much the same as a single light switch, but there are some fundamental differences. Here's how to replace a double light switch, either because the original one is old or you want a new style. Working with electricity is not something to take for granted; if you're not careful, you can be seriously hurt.
Now in the diagram above, The power source is coming in from the left. Notice the black wire is the only wire that we are controlling through the 2-way switch. You have an incoming hot wire black going to one screw it does not matter if you use the brass or silver screw on the side of the 2-way switch and a black wire from the other screw on the 2-way switch going to the load light, ceiling fan etc.
Do you have a new extension in your house that needs some nice new light fixtures? Or perhaps a fancy ceiling light you want to show off in the living room? More importantly, do you want to do all the handiwork by yourself?
There are certain spaces within a house that that are wired with a double switch light. For example, it may be more convenient if a large and open plan living room had a double switch light installed near the door. Or if a double bay garage had a double switch light installed at the entrance of the garage.
It isn't unusual to wire two or more light and switch combinations from the same power source -- in fact, it's common practice. Typically, the source is a circuit breaker in the main electrical panel that has a rating large enough to handle the lights. It's possible to mount the switches in the same or in different electrical boxes, but the latter case involves the extra task of running a circuit cable between the boxes. You maintain the continuity of the hot wire in the circuit cable by forming pigtails at the points where it connects to the switches.
By code, the number of conductors allowed in a box are limited depending on box size and wire gauge. Calculate total conductors allowed in a box before adding new wiring, etc. Check local regulations for restrictions and permit requirements before beginning electrical work.