Electricity moves because there is a pressure called volts, and those volts are being applied to some sort of circuit. Most utilities provide 240 volts to homes, generally with two 120 volt conductors.
Electric current is measured in amps. The more current, the more pressure (volts) and there is also a resistance to flow (ohms). The larger the flow, the more pressure. The more resistance, less pressure.
Controlling the Flow
Two dangerous things can happen with the flow of electricity:
- Too much amps will cause overheating and possibly a fire.
- Electricity may flow where it is not supposed to.