Disconnect wiring change 125v to 250v

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J

johnmusk

New User
Location
North Carolina
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computer programmer
Not too experienced here. Got this old disconnect (I think it's at least 50 years old) serving a furnace at 125 V. Going to install an air handler that needs 250 V.
Assuming I'm keeping this disconnect for a few months, can I just take the neutral wire and connect it to power at the distribution panel (this will give me 250 V).
Or is it not ok to do this? Do I need to replace the romex going from the disconnect to the main panel? Thank you.


furnacedis.jpg
 
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