Electrical quick guide diagrams and charts
Here is an electrical quick guide for residential wiring. This includes many applications in home wiring such as basic lighting and outlet circuits, 240-volt wiring, phone and doorbell wiring and home network and security system wiring.
Diagrams make understanding easier because you can see how each circuit is put together. This wiring guide also has a chart on OHMS Law. You may be wondering what Ohms Law has to do with home wiring. Well, when we calculate how much voltage and current each circuit uses, we use Ohms Law to establish wire sizes and breaker sizes.
This helps us determine how to put in electrical circuits that are within code so the wires don’t overheat. Sometimes it’s easier to just get a list of local codes without understanding the aspects of electrical theory. That’s just fine.
If you want to know exactly how much current an over/range uses for example, then you’ll need to do some easy math using Ohms Law. Here’s what I mean
We already know that an oven/range uses 240 volts according to local codes everywhere. We know that the maximum current is going to be 50 amps because of local codes. How do we calculate how much wattage the oven will use as a maximum? Just take 240 times 50 and that will give you 12,000 watts.
That is a really high number of course because most oven/ranges use around 7,000 watts. Each appliance has a rating on it. By using an Ohms Law chart you can figure out any appliance consumption needs and any breaker sizes.
Over 4 million visitors to this site since it was born!
My newsletter keeps you up to date on home construction and design ideas.
I just wanted to say that I love your website. My husband and I followed your instructions on building our own home. Most of the work we did ourselves, but not all. We saved $90,000 in labor costs and now have a beautiful home that we own.
--Sue and Les Carrigan, Draper, Utah
I built my own home doing all my own labor. My house costs me around $70,000 for materials. It took me 8 months to build and is about 2,000 square feet. I didn't think I could do it, but your house web site encouraged me. I used all the info you had.
Benny Luis Lopez,
I can't thank you enough for your free information web site about home building. I was looking for Electrical wiring diagrams when I found your site. It was very helpful.
Little Rock, Arkansas
My wife and I lost our home to foreclosure but we kept a plot of land to start over. We are halfway through the construction of our house. Your website gave us hope to start over and build a house with low payments. We are in our late 60's but we find it rewarding to put so much effort into a project that will reward us for years to come.
Name respectfully withheld