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#10195 06/01/02 07:34 AM
Joined: Mar 2001
Posts: 2,056
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Redsy Offline OP
Member
I've noticed that many of the "Home Inspection Reports" related to real-estate transactions recommend "exercising" circuit breakers on a regular basis.
What are your thoughts?

Joined: Oct 2000
Posts: 4,042
Likes: 3
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Redsy,

I've always thought the same thing and would probably bet that I've read it somewhere in mfgrs instructions or recommendations. I've seen a lot of times where someone will turn off their Main to do work (as recommended) and it will not reset, and I was thinking that 20+ years in one position in a damp basement can't be good for anything. [Linked Image]

Bill


Bill
Joined: Oct 2000
Posts: 5,389
S
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I had heard some years ago of a UL requirement to 'mechanically' operate breakers manually but have never verified this.

Joined: Aug 2001
Posts: 7,520
P
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I think it's a good idea to cycle breakers, maybe off and on a couple of times ar least once a year.

Joined: Aug 2001
Posts: 599
N
Member
That just happened to me last week. I swung by a friends to demo a floor box she didn't want before the new carpet was put down the next day. I figured I could squeeze it in before my final at school the same night. Rather that trace out which circuit I threw the main. On my way out I turned it back on and wouldn't you know it, the thing would not reset. I don't know if it was from not being exercised or if it just broke. It did not sound to good inside.

Joined: Nov 2000
Posts: 2,236
Member
Outdoor discos mounted below OH meter bases are the worst... Especially when SEU cable and a "WP" hub is involved. I tend to shy away from switching any mains unless absolutely neccesary.

*crunch*


-Virgil
Residential/Commercial Inspector
5 Star Inspections
Member IAEI
Joined: Apr 2002
Posts: 2,527
B
Moderator
66vdub-- sounds like a classic high-pucker-factor 'trap.'

Rambling Notes on circuit breakers after installation

NETA MTS-2001 7.6.1.1 Circuit Breaker INSPECTION PROCEDURES “Inspect ∙ Clean ∙ Operate the circuit breaker to insure smooth operation…”

{Factory-applied lubricants harden/leach. Do not use spray lube/cleaner unless it’s in CB maintenance instructions.}

Vaguely related links: http://www.nema.org/products/div5/5ab/guess.html http://www.seekandsource.com/news/Articlespec.Asp?Article_id=ARTI93 http://www.powellservice.com/PASD%20Test%20Procedures/TABLE%2010.7.doc http://www.ch.cutler-hammer.com/fred/cscpgh/fax/00000291.pdf http://www.ch.cutler-hammer.com/fred/cscpgh/fax/00000253.pdf http://www.ch.cutler-hammer.com/fred/cscpgh/fax/00000607.pdf http://www.ch.cutler-hammer.com/fred/cscpgh/fax/00000615.pdf http://standards.ieee.org/colorbooks/sampler/Bluebook.pdf


[This message has been edited by Bjarney (edited 06-02-2002).]

Joined: May 2002
Posts: 68
H
Member
does any body use nolox when you install a main or any other high amperage breaker on a buss that's aluminum. I have had many breakers fail because of this problem and have been using the nolox for some time.
:Wayne


Be Fair, Be Safe
Just don't be Fairly Safe
Joined: Apr 2002
Posts: 2,527
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Moderator
hurk— Be Careful. That may be a misapplication if using particle-bearing inhibitor or any substance on the spring-clip/stab end of molded-case breakers. Conductive particles in sticky paste may incite carbon tracking and breakdown if left in contact with {bakelite} insulating surfaces.


[This message has been edited by Bjarney (edited 06-03-2002).]

Joined: Mar 2001
Posts: 2,056
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Redsy Offline OP
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I've wiped a little nolox on meter stabs when I've had difficulty removing the meter.

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