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Botl in or stab in? #173705 01/16/08 05:20 PM
Joined: Jan 2003
Posts: 21
R
rj Offline OP
Member
I am in need of some information about bolt in breakers compared to stabe ins. I know that you are suppost to have a better connection with a bolt in, but what about maintenace in the long run. Myself I would rahter work and maintain the stabe in. Any others with that feeling or that bolt in is the best way to go?
Thanks for any input on this.

Work Gear for Electricians and the Trades
Re: Botl in or stab in? [Re: rj] #173706 01/16/08 05:27 PM
Joined: Jul 2007
Posts: 265
W
wire_twister Offline
Member
I like the bolt in for areas with high load or vibration. I worked in manufacturing plants for about 16 years, most of the equipment was either Westinghouse or Square D bolt in type, all of it gave vary little trouble. As far as maint. goes we would shut down the panels once every other year and check the screws for tightness, I do not remember ever tightning one more than about 1/16 of a turn, of course all this was wired with copper wire, as it should be in an industrial setting.


Jimmy

Life is tough, Life is tougher when you are stupid
Re: Botl in or stab in? [Re: wire_twister] #173708 01/16/08 08:58 PM
Joined: Aug 2007
Posts: 853
L
leland Offline
Member
Industrial: bolt in every time. reliability.

Resi: stab ins are fine, very low demand.

Re: Botl in or stab in? [Re: leland] #173725 01/17/08 06:59 AM
Joined: Mar 2005
Posts: 1,213
S
SteveFehr Offline
Member
Anywhere with potentially high fault current requires bolt-on, because the electromagnetic forces in a full-blown short-circuit fault can be enough to tear cables right out of set screws, and breakers right off the panel.

If you're just fed from a small transformer (ala residential size) or otherwise have low availible fault current, then it's less of an issue.

Re: Botl in or stab in? [Re: SteveFehr] #173726 01/17/08 09:12 AM
Joined: Dec 2000
Posts: 4,287
electure Offline
Member
I agree with the rest of the guys that in most cases I prefer a bolted connection.

That said:
The Square D "I-Line" breaker, their premium offering, is a plug in.

[Linked Image]



The lowly ITE-Bulldog Pushmatic is a bolt on breaker.

[Linked Image]

laugh



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