Replace A Circuit Breaker Video
OK, one big thing I left out of the video, on the breaker you’re replacing there will a number on it. In most cases, it will be right on the handle (switch) stating 15 or 20 amp or really whatever it may be. This is the amperage, this means if the circuit is drawing more than the stated amperage that the breaker will trip, now once a breaker trips you should wait at least 10 minutes before attempting to reset it. The reason is that the whole circuit has been overloaded and you should let it cool down first.
Never ever keep trying to reset a breaker that has failed. Doing so will provide the circuit with electricity and this is bad. Say the breaker tripped because a rat chewed the insulation on the wires and now they’re touching. The breaker did its job once for you. Don’t think it will keep doing so.
This I have seen before, a 15 amp breaker keeps failing, it trips ever so often and now the homeowner changes it does a 20 amp thinking that it should work now. You know what, he was right. It did work, meaning that the breaker doesn’t trip for a whole two weeks. Instead, the 14/2 15 amp wire in that circuit melted and made a fire. A very bad choice for him.
For a 15 amp circuit uses a 14 gauge wire with a 15 amp breaker
For a 20 amp circuit uses a 12 gauge wire with a 20 amp breaker
As you can see from the picture below that the bus bars are staggered so the breaker that would be on top of the other one right on top of it will not take power from the same busbar (phase)
So in other words, if you were to install a two-pole breaker (220 volts) it will take power from both bus bars (both phases) creating 220 volts