I replaced a 20 amp double pole siemens breaker and my circuit is still dead. I have a submersable well pump and my shed on this circuit . It has been fine for 4 or 5 years and now nothing. I am a novice . Any ideas?

Did you check for voltage at the buss bar? How about voltage at the end, well or shed? Could be a broken wire

I have 110 on one of the wire at the well where it all comes together the other is dead

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Originally Posted by collin74

i have 110 on one of the wire at the well where it all comes together the other is dead

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If you are sure all connections are tight, you most likely have a broken wire. I assume it is buried? If it in buried conduit you may be able to pull another wire through . How do you get 120 for the shed if you only have 240 going out.
You would need a neutral. Is this a 3 wire feed?