bigdee
Commander
- Joined
- Jul 27, 2006
- Messages
- 2,667
I got this one to try .. https://www.harborfreight.com/indust...tor-68247.html
Ok lets say hypothetically this guy wasn't thinking at the time and wired his compressor with #10 solid wire .. Hind sight would have been to get braided wire ..
And lets say that while he was moving the compressor around to re- position it the wire sheathing was compromised by the wire clamp going into the sub panel box .. Other than just waking him up the 25 amp breaker did exactly what it was supposed to do . Trip .. Now lets say he had a 40 amp breaker and the same thing happened .. Would the bigger breaker have tripped ?
It certainly would, in fact a 60 amp would too. Overload on a conductor is based on time or how long the overload condition exists. A short circuit creates an extremely high current that will trip the breaker instantly. A breaker has two functions;
1. time based overloads. Breaker trips proportional to current vs time
2. Instantaneous trip. Breaker trips at a certain threshold of high current....no delay
The two physical functions that cause a breaker to trip are thermal (monitors overloads and will trip after a period of time) and magnetic (solenoid opens breaker instantaneously).
The other thing here is if the compressor can be moved around it can NOT be wired directly into the sub-panel. It would have to have a cord that was plugged into a receptacle.
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