Message Board Thread - "Risk Control Specialist"

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Risk Control Specialist Dragon 9/29/2006
I have an IR picture of a 20A breaker that indicates a 10 deg F. difference in heat from that of surrounding breakers. However the ampacity of this breaker is 6.7A. What is causing this anomaly?
Re:Risk Control Specialist Bob Berry 9/29/2006
How many Amps on the other breakers?
Re:Risk Control Specialist Ea1Services 11/1/2006
Your discription of the observations are too vague. If your looking at a breaker, then you need to have a base shot to determine the rise in temp. If the rise is 10F, that doesn't mean much. All electrical components have an amperage rating and if you do enough homework, you find that the load on the breaker is the problem. Now if the breaker is not tripping with an over load, you'll get a significantly high level of rise in temp. I would contact the breaker manufacture and ask what temperatures are these rated for. Some breakers do have this in their label. Remember though your not reading true temp with the IR.
Re:Risk Control Specialist Laland 11/2/2006
Is the breaker single phase or three phase? Are both ends have the same temperature? Check again your load and compare it with the other loads.
Re:Risk Control Specialist Pete 11/22/2006
Be careful, you can not compare the temperature of one breaker to any other breakers in a panel unless: The breakers are all the same rating and carrying the same current. Don't let yourself get caught comparing apples and oranges.

We have untrained people, at our plant, who will look at an image of a panel and panic because one breaker is "Hotter" than the others. What they fail to realize is the loads are different or the breakers are de-energized.



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