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=== === Yes but it is redundant. The only place that you can open the neutral and hot wire at the same time in a North American system is when isolating a load in an explosion proof installation All the rest of the time the neutral remains unswitched. A two pole switch is used on 240 volt loads as code states that both legs must be disconnected from the load. If only one leg is disconnected there will still be a 120 volt potential on the load to ground. <><><> As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.
Before you do any work yourself,
on electrical circuits, equipment or appliances,
always use a test meter to ensure the circuit is, in fact, de-energized.
IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
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Can you feed a 208v 200amp panel from 480v 20amp circuit?
Not directly, you would need to transform 480v circuit to 120v with a transformer first.
Why is the main switch connected in series together with the rest of the circuits in the house?
It is connected so that it can disconnect the entire power grid in the house with one switch. This switch is usually integrated into a circuit breaker. No matter how one looks at it, this switch must be made to withstand (and be able to switch) great currents (in excess of 16A) at relatively high voltages (120V/230V). Special care must be taken during the design phase, as the switch will most likely have to suffer severe arcing as well as heating, during normal operation.
Can you use a 240V disconnect switch for a 120V AC?
Yes and you will have a spare terminal for future use
Is there a way to install a 277V light on a 120V circuit?
no ----------------------------------------------------------------------------------- Stepdown transformer. More expensive than buying the correct light fixture. Y-THINK-Y
Is number 10 wire good for a 20 amp circuit that is 250 feet?
Assuming you are working with 120v, you need #4 AWG copper conductors.
