Back fed breaker being used as main breaker in a main lug only panel
- Thread starter Roy Rice
- Start date
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hillbilly1
Senior Member
- Location
- North Georgia mountains
- Occupation
- Owner/electrical contractor
As long as it's a bolt in breaker or has a retaining clip or screw if it's a snap in, it should be compliant.
- Location
- Logan, Utah
- Location
- Connecticut
- Occupation
- Engineer
I'd think the 90A c/b would need to be listed as a "back-fed" type breaker to be compliant, as well.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
I know certain panel will not accept a retainer clip but it must have one to be compliant.
I have never noticed a back fed rating of a breaker. I am not sure why that would be necessary.
I have never noticed a back fed rating of a breaker. I am not sure why that would be necessary.
- Location
- Connecticut
- Occupation
- Engineer
I think that by using a breaker that has "line" and "load" terminals as a back-fed breaker, you are violating the listing of the breaker by connecting "line" to the "load" terminals. Maybe its not so much that the breaker is listed as "back-fed" as that it is not listed for "line" and "load."
I remember reading about that issue on the MikeHolt website before. If I could find a link to the article, I'd post it.
- Location
- Massachusetts
Few if any 90 amp CBs will be marked line and load so forward, backward it does not matter.
However I do agree if it was marked line and load we would have to respect that labeling.
However I do agree if it was marked line and load we would have to respect that labeling.
- Location
- Logan, Utah
That information comes from the listing of the breakers.
From what I have been told any breaker that is listed and labeled without a line and load marking have been evaluated and listed for back feeding.
Chris
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
That's a specification, not a requirement.
petersonra
Senior Member
- Location
- Northern illinois
- Occupation
- engineer
I don't have a problem with it, with the details given. It seems a little odd, but it could well be code compliant.
- Location
- New Jersey
- Occupation
- Journeyman Electrician
Yup, the 90 amp could even be a bolt on type CB.
ptonsparky
Tom
- Occupation
- EC - retired
Depending on the code at time of installation a retaining device may not have been required.
If it is a bolt-on breaker, no hold down is required, only required on a plug-in type breaker.
408.36(F) 2008 ed.
(D) Back-Fed Devices. Plug-in-type overcurrent protection
devices or plug-in type main lug assemblies that are
backfed and used to terminate field-installed ungrounded
supply conductors shall be secured in place by an additional
fastener that requires other than a pull to release the
device from the mounting means on the panel.
Bolt-on main lug panel w/ back-fed main.
408.36(F) 2008 ed.
(D) Back-Fed Devices. Plug-in-type overcurrent protection
devices or plug-in type main lug assemblies that are
backfed and used to terminate field-installed ungrounded
supply conductors shall be secured in place by an additional
fastener that requires other than a pull to release the
device from the mounting means on the panel.
Bolt-on main lug panel w/ back-fed main.
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