For example, Let's say you want to power a 100 watt 12 volt light bulb or something that takes 100 watts and you have to go 20 feet with it and you allow a 2% voltage drop.
That means that you would have to use a # 8 wire per my calculation to use that 100 watt device.
Now if we double that voltage to 24 volts and power our 100 watt device, than the wire size can be a#10 wire now.
And with 48 volts, it can be a # 14 wire.
What about 120 volt DC? # 18 size wire with our example and you can power many 120 volt ' ac ' devices with that DC power like your vacuum cleaner, circular saw, Incandescent bulb, corded drill with no speed control, electric heater or toaster with no electronic control. etc etc,
That means that you would have to use a # 8 wire per my calculation to use that 100 watt device.
Now if we double that voltage to 24 volts and power our 100 watt device, than the wire size can be a#10 wire now.
And with 48 volts, it can be a # 14 wire.
What about 120 volt DC? # 18 size wire with our example and you can power many 120 volt ' ac ' devices with that DC power like your vacuum cleaner, circular saw, Incandescent bulb, corded drill with no speed control, electric heater or toaster with no electronic control. etc etc,
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