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Q: Can you feed 200 amps to 100 amp panel?

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Yes. You need to balance loads since you are not getting an extra 100 amps, your overall limit is still 200 amps.

You can as long as you don't assume that this gives you another 200 Amps to use. Your overall amperage will still be only 200 Amps. You can supply the sub-panel with a smaller breaker than 200 Amps.

Your main service panel will have a plate or sticker telling you.

Yes but if the total current exceeds 200 amps the panel will be overloaded and the main breaker will trip.

Yes, you can feed two 100 amp circuits off of a 200 amp main distribution panel.

Any combination that adds up to or less than 200 amps.

A #1 copper conductor is rated at 140 amps with an insulation rating factor of 90 degrees C at 240 volt single phase, will give you a full 100 amps at 200 feet. #4 wire should give you 95 amps. Anything over 200 feet you will start loosing more amps.

No, absolutely not. The wiring supplying your 100 A panel can only carry 100 amps, not 200 A !If you were to install a 200 A main breaker and then draw more amps than the supply wire can carry, it would overheat and burn. Good way to burn your house to the ground.

No, if the UL Rated Listing for the Panel is 200A than that's it. You cannot have 300A flowing through a 200A Panel.

A #1 copper wire with an insulation rating of 90 degrees C is rated at 140 amps.

This is a voltage drop question. A voltage value needs to be stated. Assuming that the 200 amp panel is a single phase 120/240 volt sub panel. A #1 copper conductor will limit the voltage drop to 3% or less when supplying 100 amps for 200 feet on a 240 volt system.

100-200 Amperes.

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