Electrical help

[shiner78]

I'm talking about the cover around the compress.


I help more tomorrow if need. It's bed time.

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[jaspermac]

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[db@100]

Not running it on an extension cord are you?

[jaspermac]

Not running it on an extension cord are you?

Nope.

[JhuntsAlot]

Question, is the compressor brand new or used?



J

[jaspermac]

Question, is the compressor brand new or used?



J

It’s used but barely. It worked great at the previous owners shop

[Pstraw]

Does it trip trying to start or after it's running?
Have you tried it on another circuit?

[RonRon]

Just about all motors have a big amp draw on start-up. And, then the amp draw settles down after the start-up. [Lock Rotor Amp versus Running Load Amp]

The efficiency of the motor dictates the amp draw.

If this compressor is the only load on this circuit, it would be fine to put a larger breaker on it......just to cover start-up

This is very prevalent in A/C compressors. On very inefficient units, the code will allow you to put a 50 amp breaker on a 25 amp motor.........just to prevent the breaker from tripping on start-up

To confirm, put an amprobe on the unit, turn it on, and you will see a major spike when it first kicks on, then the amp draw will settle down after it's running.

[Mike D]

Just about all motors have a big amp draw on start-up. And, then the amp draw settles down after the start-up. [Lock Rotor Amp versus Running Load Amp]

The efficiency of the motor dictates the amp draw.

If this compressor is the only load on this circuit, it would be fine to put a larger breaker on it......just to cover start-up

This is very prevalent in A/C compressors. On very inefficient units, the code will allow you to put a 50 amp breaker on a 25 amp motor.........just to prevent the breaker from tripping on start-up

To confirm, put an amprobe on the unit, turn it on, and you will see a major spike when it first kicks on, then the amp draw will settle down after it's running.

This is true but on a typical thermal mag breaker, there is enough “time” to get the motor started up before the breaker trips.

I suspect he has an issue with his start capacitor or something else going on in the motor.

He also could just have a bad breaker but since he’s already upsized form 15A to 20A that seems unlikely.


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[Johnny Dangerr]

Obviously too much draw on that circuit. Don’t go to 30 amp breaker unless your current wire is 10/2. If it was a 15 amp circuit before it’s probably 12/2 wire. If you’ve got room in your panel for an additional 20 amp breaker, just make you a short drop with a plug box and plug in and see if it works. If no problems then you can add a dedicated circuit just for that piece of equipment. Plus this will tell you if it’s a motor issue instead of an electrical issue.

This^^

I have 3 circuits in my garage to keep up...

[Rubi513]

This is true but on a typical thermal mag breaker, there is enough “time” to get the motor started up before the breaker trips.

I suspect he has an issue with his start capacitor or something else going on in the motor.

He also could just have a bad breaker but since he’s already upsized form 15A to 20A that seems unlikely.


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From what I am understanding he changed the "outlet" and not the breaker...

[dclifton]

Go to a 30 amp breaker for a bit and see if that fixes it? Still i would get an amp meter on it to see if it has excessive draw on start up and when builidng pressure.


What amp breaker was it on prior?

[jaspermac]

Just to clarify, the circuit has a 20 amp breaker and 15 amp plug. I changed the plug to 20 amp last night. I’ll run it’s own circuit with 12/2 and 20 amp plug and breaker this weekend to see if that helps.

Last resort will be 10/2 with 30 amp breaker.

[db@100]

Just for grins, check the terminal connector where the white wire is connected. In the picture, the wire on the left looks to be a little discolored. This connection may be loose.

[ATI]

Return it if you can. It just may be a lemon.