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Should A Breaker Be 768 F? #118293 09/02/04 03:59 AM
Joined: Jan 2003
Posts: 4,391
I
iwire Offline OP
Moderator
This is a Thermal Image of a Siemens bolt on panel from Capt. Al. The screw holding a single pole 20 amp breaker to the bus was loose.

[Linked Image]

The 409 C number is the temperature at the cross hairs.

Now this panel needs replacment, the copper bus for phase "B" is now gray.

Bob


Bob Badger
Construction & Maintenance Electrician
Massachusetts
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Re: Should A Breaker Be 768 F? #118294 09/02/04 07:45 AM
Joined: Dec 2000
Posts: 4,283
electure Offline
Member
What seems amazing to me is the tiny area that appears to be so hot. Although you can see the heat on the BØ, it looks like the heat dissipates pretty well, considering the extreme temp.

Re: Should A Breaker Be 768 F? #118295 09/02/04 07:41 PM
Joined: Jun 2004
Posts: 206
C
capt al Offline
Member
This was taken in a computer testing lab with plenty of Liebert A/C cooling the area. Probably helped the heat to dissipate. The lighter the blue color on "B" phase is the heat dissipating over the bus. Darker blue is a cooler temp.

The circuit fed a dedicated receptacle for computer equipment. The only problem was someone plugged six five foot plug strips into the dedicated circuit. "IT" guys just plug and play.

Re: Should A Breaker Be 768 F? #118296 09/03/04 08:20 PM
Joined: Jun 2003
Posts: 1,143
D
DougW Offline
Member
Or should it be "plug and pray?"

Re: Should A Breaker Be 768 F? #118297 09/05/04 03:07 PM
Joined: Jun 2004
Posts: 206
C
capt al Offline
Member
Doug, you are right. With "IT" guys it should be plug and pray. The above pic tells it all.


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