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tandom breaker #86704 11/23/03 08:56 AM
Joined: Mar 2003
Posts: 92
gserve Offline OP
In a mobile home the other day I saw a tandem breaker (20A/30A)where the 20A outside Breakers that are connected by a handle tie were feeding 2 separate 120V circuits(not multiwire).I removed the handle tie so that if 1 circuit trips the other won't. Did I do the right thing? These breakers are designed for 2 separate 240V loads.

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Re: tandom breaker #86705 11/23/03 09:32 AM
Joined: Oct 2000
Posts: 3,961
Bill Addiss Offline

If the breaker says common trip they'll both trip with or without the handle.

This is from a Siemens Catalog showing 2 different types:

[Linked Image]

Personally, I don't think one of the outside breakers would trip the other unless they were common trip.


Re: tandom breaker #86706 11/24/03 08:09 AM
Joined: Mar 2003
Posts: 92
gserve Offline OP
Bill, These are not common trip it says so on the breaker it is a Cutler-Hammer type BR breaker.

Re: tandom breaker #86707 11/24/03 11:07 AM
Joined: Oct 2000
Posts: 3,961
Bill Addiss Offline
If the circuits are unrelated I don't see anything wrong with removing the handle.


Re: tandom breaker #86708 11/24/03 01:24 PM
Joined: Aug 2002
Posts: 1,081
ThinkGood Offline

Is the breaker designed such that the handle can be removed with out changing the UL listing (in other words, is the equipment being modified by removing the handle)?

Re: tandom breaker #86709 11/24/03 01:29 PM
Joined: Aug 2003
Posts: 1,374
Ryan_J Offline
TG: I think that perhaps 110.3(B) has been violated, but I would never dream of red-tagging it. It is my understanding that breakers are required to be "atoumatic trip", meaning that they will open the circuit regardless of the handles position. With that in mind, I see no problem removing handle ties.

You do have a valid point, however.

Ryan Jackson,
Salt Lake City
Re: tandom breaker #86710 11/24/03 08:57 PM
Joined: Apr 2002
Posts: 7,211
HotLine1 Offline
Yes, it may be a "technical" violation for removing the handle tie, and yes, I would not red-tag it either, unless the cb was installed in violation of the panel "label"

Basically this type of cb is 'used' to add additional circuit capacity to a panel, and if it's a 16 circuit panel, this baby wouldn't fly.


Re: tandom breaker #86711 11/25/03 10:22 PM
Joined: Jan 2003
Posts: 18
Inspector Grump Offline
If you remove the handle the breaker is no longer "listed" and becomes a violation!

[This message has been edited by Inspector Grump (edited 11-25-2003).]

[This message has been edited by Inspector Grump (edited 11-26-2003).]



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