In North America, these wires are actually two 110-120 volt AC power mains and one neutral line. Some people see the three wires coming from the electric pole to the electric meter on the side of their house and think they represent positive, negative, and ground.
With that said, we’ll cover circuit breaker panels by answering the two big basic questions many homeowners ask: “Why three wires?” and “What is the ground?” Why Are There Three Wires Coming Into My House?
You can probably find a fuse box in an older home, but it really should be replaced with a circuit breaker panel for safety’s sake. Fuses take time to heat up and blow, and when that happens, you have to purchase and install replacements. Breakers trip open circuits faster during a circuit fault and can be reset with the flip of a switch. Circuit breakers came into use because they were safer than fuses. If your home was built after 1961, it’s very likely that you have a circuit breaker panel and not a fuse box. And it’s always smart to sort your circuits so you’ll know what breaker switch controls what.įirst, remember that even though people still call it a fuse box, yours probably isn’t. Besides, getting to know your fuse box might save you some money down the road. You don’t need to know how to wire a fuse box to understand the basics of how it works.
While it’s good to have your fuse box checked out by a licensed electrician once in a while, it’s also good to have a working knowledge of just how the thing does its job. Most homeowners don’t think too much about their fuse boxes until they want to install an outlet, ceiling fan, or light fixture, or one of the fuses blows.
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