We all have a mountain of electrical appliances around the house and may, if not all, of them have some sort of motor running them. These may include furnaces, dishwashers, sump pump, garbage disposal, and microwaves.
So how is one to know what sized circuit to put each of these items on? You see, the circuits are protected by either circuit breakers or fuses that limit the amount of amperage allowed to flow through that circuit. They watch over the circuit's power draw like a watchdog. But still, how do we determine the right size for these circuit breakers and fuses?
...Source: http://electrical.about.com/b/2013/03/30/how-the-use-of-ohms-law-helps-determine-safe-capacity.htm
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