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leibold
Premium,MVM
join:2002-07-09
Sunnyvale, CA
kudos:10
Reviews:
·SONIC.NET
reply to kherr

Re: Backfeed breakers ... are they the same .....

For residential use, Square D makes loadcenters (breaker panels) for QO series breakers and HOM series breakers (they are not interchangeable).

When using a plugin-style breaker (QO and HOM both are) as backfeed breaker then a retaining kit is required to hold the breaker in place (prevents the breaker from popping out of the panel bus). This also applies to most other brands of residential breakers.

A retaining kit is not needed for bolt-on breakers (such as Square D QOB breakers) which are more common in commercial/industrial applications.

Edit: fixed spaces in URL
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kherr
Premium
join:2000-09-04
Collinsville, IL

I'm QO all the way. The retaining kit came today and stated to use with "backfeed breakers only", hense the question.



leibold
Premium,MVM
join:2002-07-09
Sunnyvale, CA
kudos:10
Reviews:
·SONIC.NET

The only limitations regarding backfeeding that I could see were:

- QO-GFI (combination circuit breaker GFCI) should not be used as main breaker or backfeed breaker.
- Some Square D panels with 100A main breaker can only be used with backfeed breakers up to 70A.

You should be fine with any standard 2-pole QO breaker.
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