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#44963 11/16/04 01:34 PM
Joined: Aug 2004
Posts: 54
G
Member
Hi All,
can someone here tell me what the abbrev "HACR" stands for on Sq D breakers. (for use w/ heating and refer equip., having motor group combinations, and marked for use with HACR curcuit breakers.)...so far I looked in articles 240, 404, 440, and the index. just want to know what the abbrev spelled out is.
thanks.

#44964 11/16/04 01:51 PM
Joined: Aug 2003
Posts: 1,374
R
Moderator
Heating Air conditioning and refrigeration


Ryan Jackson,
Salt Lake City
#44965 11/16/04 02:31 PM
Joined: Aug 2004
Posts: 54
G
Member
thanks Ryan!

#44966 11/16/04 04:46 PM
Joined: Apr 2004
Posts: 201
Member
This trade uses a lot of acronyms. I went for about three years before I finally asked someone what it stood for (I didn't want to look like an idiot). Waiting that long was the stupid part. That is the nice thing about forums like this, you ask a question and get (normally) an answer without anyone laughing at you. [Linked Image]

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Charlie Eldridge, Indianapolis, Utility Power Guy


Charlie Eldridge, Indianapolis Utility Power Guy
#44967 11/16/04 06:33 PM
Joined: Aug 2003
Posts: 1,374
R
Moderator
Your certainly welcome.

While we're on this topic, perhaps someone can give me an answer to this:

I have been told that any molded case circuit breaker listed under the UL 429 (I think 429???) for overcurrent devices already meets all of the requirements for an HACR device. I beleive there is something in article 430 of the 2005 that addresses this as well.

Does anyone have any input on that?


Ryan Jackson,
Salt Lake City
#44968 11/16/04 06:51 PM
Joined: Aug 2003
Posts: 1,374
R
Moderator
Edit to above: UL 489


Ryan Jackson,
Salt Lake City
#44969 11/16/04 06:57 PM
Joined: Apr 2004
Posts: 201
Member
Ryan, I found this in the UL White Book but didn't find anything in the 2005 NEC.
Quote
Circuit breakers investigated for use with heating, air conditioning and refrigeration equipment comprising multi-motor or combination loads are marked ‘‘HACR TYPE,’’ in conjunction with the Listing Mark. Such circuit breakers are suitable for use with heating, air conditioning and refrigerating
equipment marked for use with HACR type circuit breakers. Use of these circuit breakers with heating, air conditioning and refrigerating equipment is limited to installations where the equipment is marked as suitable for use with any properly sized circuit breaker, or is marked for use with a HACR type circuit breaker, or is not limited by any marking as to the type of branch circuit, short-circuit and ground-fault protective device.
This was found under CIRCUIT BREAKERS, MOLDED-CASE AND
CIRCUIT BREAKER ENCLOSURES (DIVQ). [Linked Image]


Charlie Eldridge, Indianapolis Utility Power Guy
#44970 11/16/04 08:41 PM
Joined: May 2003
Posts: 2,876
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e57 Offline
Member
Charlie, does that mean I can no longer use HACR breakers for everything under the sun, spare SWD (switch duty breakers)?


Mark Heller
"Well - I oughta....." -Jackie Gleason
#44971 11/16/04 09:57 PM
Joined: Apr 2004
Posts: 201
Member
I don't believe you ever could. [Linked Image]

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Charlie Eldridge, Indianapolis, Utility Power Guy


Charlie Eldridge, Indianapolis Utility Power Guy
#44972 11/17/04 12:45 PM
Joined: Aug 2004
Posts: 54
G
Member
CharlieE,
that's what actually got this thread started for me. the facility I work at now swapped out a bunch of panels in 2 of our buildings a few years ago, and within the last year, about 40 two-pole breakers "froze up" in the off/tripped position. Upon replacement of said breakers, it was discovered that they were of the HACR type. I had a hunch that they wore out due to misapplication. (they were feeding lights and outlets.) either that, or they just got a bad batch off the production line?
>Will

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