Free-wiring-diagram for breaker box
This free-wiring-diagram is taken from my book where the information is much more complete than this website. That's why there is a diagram number at the bottom of the pic. The big 1/0 gauge cables that come from the meter are Aluminum cables that resist heat really well. Two cables will connect to the hot bus bars and one cable will connect down to the neutral bus bar. That bus bar will be grounded by a 6-gauge copper wire that goes back outside and connects to a copper grounding rod that's driven into the ground. The rod is four feet long and if you're hammering it into rocks, it's kind of tough. The picture of the breaker box shows different sizes of breaker fuses. The narrow breakers cover only one hot bus giving it 120-volts. The wide breakers cover two hot bus bars giving them 240-volts. That's how the voltage differences work. The amperage ratings of the breakers is a different kind of thing that works on current or Electric flow. They trip if there is over-current in the case of a short circuit.
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