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#117655 06/28/04 04:55 AM
Joined: Jan 2003
Posts: 4,391
I
iwire Offline OP
Moderator
One of the service guys found this on a service call.

Details to follow when I get back from NY.

[Linked Image]


[Linked Image]



[This message has been edited by iwire (edited 06-28-2004).]


Bob Badger
Construction & Maintenance Electrician
Massachusetts
#117656 06/28/04 09:49 AM
Joined: Apr 2002
Posts: 2,527
B
Moderator
iwire — A fantastic Monday-morning shot.

"Lest we forget."

#117657 06/28/04 11:28 AM
Joined: Feb 2004
Posts: 1,437
Member
Dang that must've been a deafening bang when that happened! [Linked Image] Was someone torquing one of the neutral lugs & slipped into the phase busbars?

-Randy

#117658 06/28/04 04:38 PM
Joined: Apr 2004
Posts: 36
S
Member
I found a simular damage with a water drip between A and B phase in a 100 amp service before. I wonder if this is outdoors.

#117659 06/28/04 10:30 PM
Joined: May 2003
Posts: 2,876
E
e57 Offline
Member
Lostazhell - I thought the same thing. Someone is seeing spots now, maybe?

No, I take that back! In pic 1, note the clean spots where the cover of this section would go. They're clean! The cover was on when it happened!

I don't think it happened over time though, due to the sprayed metal.

A mystery......... Oooooo!


Mark Heller
"Well - I oughta....." -Jackie Gleason
#117660 06/29/04 03:07 AM
Joined: Feb 2004
Posts: 1,437
Member
Mark,
I see what you're talking about, but the cover would be mounted to the 2 top metal "flanges?" either side of the neutral bus.. & those aren't clean like the locations I think you're referring to... If I remember right, & if I'm looking at this right, this is a GE 3phase (400A?)panel.. Isn't the deadfront attached to the panel cover??

What was bolted up there?? [Linked Image] Looking at this again is making me think something along the lines of a forklift skid.. The blown out section looks about the same size to me...
Tim, I've some across water damaged panels before also, but this is one hella blowout!

-Randy

PS Bob, don't forget to reidentify the white on the top breakers (Ckts 1,3,5 & 2,4,6) [Linked Image]

#117661 06/29/04 06:09 PM
Joined: Oct 2003
Posts: 289
:
Member
In my opinion, this could have been a lightning strike onto the phase, breaking through to the (grounded somewhere?) neutral...

With how many Amperes were the Breaker bus bars fed?

Cant wait to hear more.

Really great pics.

[This message has been edited by :andy: (edited 06-29-2004).]

#117662 06/29/04 09:37 PM
Joined: Feb 2003
Posts: 939
F
Member
randy .. take a look at the breaker again that is not a GE at all it is westinghouse breakers just let you know because i ran into this before and yes it is 400 amp bus bar size but possiblty 600 because i cant tell what size larger conductors come in bottom of box unless the whole thing is inverted.

merci , marc

[This message has been edited by frenchelectrican (edited 06-29-2004).]


Pas de problme,il marche n'est-ce pas?"(No problem, it works doesn't it?)

#117663 06/29/04 10:00 PM
Joined: Sep 2002
Posts: 909
N
Member
Those are GE TEB or TED breakers.

#117664 06/29/04 10:56 PM
Joined: Feb 2003
Posts: 939
F
Member
opps sorry i stand corrected it was my mistake i did grab the ge catalog book sure you are correct my blunder here sorry about that

merci , marc


Pas de problme,il marche n'est-ce pas?"(No problem, it works doesn't it?)

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