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Hot Circuit Breaker

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Old Feb 25, 2006 | 09:03 PM
  #1  
IROCU2's Avatar
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From: Maryland
Car: 1987 IROC-Z
Engine: 5.7 TPI
Transmission: 700-R4
Axle/Gears: 2.73
Hot Circuit Breaker

I have a 1987 IROC Z28. Now the problem I am having is that the circuit breaker for the ACC is constantly hot to the touch. I know that it is a 35 AMP circuit breaker, however everyone says it is a 30 AMP circuit breaker. Can someone tell me why this things is staying hot? Does that means I have a short somewhere? Hopefully Trickster will come to my aid. Thanks
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Old Feb 25, 2006 | 10:15 PM
  #2  
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The circuit breakers ARE indeed 35A, not 30A:



These circuit breakers are thermal devices. They heat as load increases. If load exceeds the rated current for a given time, they get hot enough to operate (open) and protect the circuit wiring and devices.

My guess is that whatever loads you have connected are near the rated current. If you check this with an ammeter, you'll probably find that to be the case.
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Old Feb 26, 2006 | 06:05 AM
  #3  
IROCU2's Avatar
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From: Maryland
Car: 1987 IROC-Z
Engine: 5.7 TPI
Transmission: 700-R4
Axle/Gears: 2.73
Originally posted by Vader
The circuit breakers ARE indeed 35A, not 30A:



These circuit breakers are thermal devices. They heat as load increases. If load exceeds the rated current for a given time, they get hot enough to operate (open) and protect the circuit wiring and devices.

My guess is that whatever loads you have connected are near the rated current. If you check this with an ammeter, you'll probably find that to be the case.
Vader, thanks for the reply. I know that the power seat, back window defogger and the power door lock are on the same circuit breaker. How do I test each one to find out where the short is? Again thanks as you can see I am new at this electrical stuff.
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Old Feb 27, 2006 | 01:03 AM
  #4  
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From: LaGrange (10min from Poughkeepsie), NY
Car: 1992 Camaro RS - not real slow anymore...
Engine: SPDC 360 MAF EFI /w a Holley Stealth Ram
Transmission: T5 untill it blows up from to much torque
Axle/Gears: Ford 9" /w auburn pro & 3.89's
Originally posted by Vader
The circuit breakers ARE indeed 35A, not 30A:



These circuit breakers are thermal devices. They heat as load increases. If load exceeds the rated current for a given time, they get hot enough to operate (open) and protect the circuit wiring and devices.

My guess is that whatever loads you have connected are near the rated current. If you check this with an ammeter, you'll probably find that to be the case.
Just remember anmeters need to be in series!
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Old Feb 27, 2006 | 06:45 AM
  #5  
IROCU2's Avatar
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From: Maryland
Car: 1987 IROC-Z
Engine: 5.7 TPI
Transmission: 700-R4
Axle/Gears: 2.73
Originally posted by Dirtbik3r
Just remember anmeters need to be in series!
Thanks Dirtbik3r but how do I use the ammeter? Thanks
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Old Mar 1, 2006 | 04:52 PM
  #6  
IROCU2's Avatar
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From: Maryland
Car: 1987 IROC-Z
Engine: 5.7 TPI
Transmission: 700-R4
Axle/Gears: 2.73
Electrical SOS

Do anyone know where I can get the 35 AMP Circuit Breaker from. I tried my local dealership but they do not stock them any longer. This seems like the hardest thing to find. Thanks
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Old Mar 2, 2006 | 09:48 PM
  #7  
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From: conway, s.c.
Car: 1989 Iroc-Z
Engine: 5.7L TPI
Transmission: 700R4
If you have the chance, go searching through the local junk (bone) yards.
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