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#86704 - 11/23/03 04:56 AM tandom breaker
gserve Offline
Member

Registered: 03/11/03
Posts: 92
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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#86705 - 11/23/03 05:32 AM Re: tandom breaker
Bill Addiss Offline
Member

Registered: 10/07/00
Posts: 4196
Loc: NY, USA
gserve,

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:



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

Bill

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#86706 - 11/24/03 04:09 AM Re: tandom breaker
gserve Offline
Member

Registered: 03/11/03
Posts: 92
Bill, These are not common trip it says so on the breaker it is a Cutler-Hammer type BR breaker.

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#86707 - 11/24/03 07:07 AM Re: tandom breaker
Bill Addiss Offline
Member

Registered: 10/07/00
Posts: 4196
Loc: NY, USA
If the circuits are unrelated I don't see anything wrong with removing the handle.

Bill

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#86708 - 11/24/03 09:24 AM Re: tandom breaker
ThinkGood Offline
Member

Registered: 08/07/02
Posts: 1084
Loc: Milwaukee, WI
Bill:

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)?

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#86709 - 11/24/03 09:29 AM Re: tandom breaker
Ryan_J Offline
Moderator

Registered: 08/19/03
Posts: 1355
Loc: West Jordan, Utah, USA
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

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#86710 - 11/24/03 04:57 PM Re: tandom breaker
HotLine1 Offline

Member

Registered: 04/03/02
Posts: 6805
Loc: Brick, NJ USA
Ryan:
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.

John
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John

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#86711 - 11/25/03 06:22 PM Re: tandom breaker
Inspector Grump Offline
Member

Registered: 01/04/03
Posts: 19
Loc: Bloomfield,NJ,USA
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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Larry

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