Square D Breaker ID

Seven-Delta-FortyOne

Seven-Delta-FortyOne

Goin’ Down In Flames........
Location
Humboldt
Occupation
EC and GC
I need to add another of these. We do not have a Square D dealer in our area, it’s all Eaton, so I don’t work with Square D much at all.

I’m trying to save myself the 200 mile round trip to the job site to open the switch gear and find a model number. Does anyone here know off the top of their head what model that is? I need to submit the cut sheet before I can even order it.

Many thanks in advance.

IMG_7744.jpeg
 
It’s in a switchgear, 1200A I believe.

I thought it was QO, but I only found QO in 10k AIC.

Engineer wants me to submit model and cut sheet for it, and I’m completely unfamiliar with SD products.

I found a QHB that is 65 and looks just like it, but I’m not familiar enough to say definitively that’s it.
 
hillbilly1 said:
Do they make a QO in 65 Kaic? Could be a QOB?
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Yes they make a QH65kAIC.
QO and QOB have the same offerings through 100A.

For the past 30 years the panelboards can accept both plug on and bolt on versions.

Switchboards for not accept QO breakers so you must have a panelboard built into a switchboard structure.
 
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jim dungar said:
Yes they make a QH65kAIC.
QO and QOB have the same offerings through 100A.

For the past 30 years the panelboards can accept both plug on and bolt on versions.

Switchboards for not accept QO breakers so you must have a panelboard built into a switchboard structure.
Click to expand...
Probably longer than that, I know at least from the 80’s. The real old bolt ins had a different bolt tab that wouldn’t fit on the QOD buss. At one time I had a few of them laying around. The NEHB? panels were plug or bolt, but you rarely seen the plug in breakers.
 
Seven-Delta-FortyOne said:
So what is the difference between the QO and the QH series? Is one more geared for commercial/industrial?
Click to expand...
Both part of QO product line.

If the part number is QO followed by numbers only it is 10kAIC rated

If the part number ends with VH it is 22kAIC.

If the part number begins with QOH it is 42kAIC

If it begins with QH it is 65kAIC

If there is a B in the number it is a bolt on breaker.

As mentioned panelboards for the past 30-40 years generally accept bolt on or plug on. "Load centers" have always been plug on only. Panelboards over ~40 years old possibly are bolt on only.

65kA are not something most suppliers will have in stock and are probably pretty expensive compared to 10kA versions. But there likely a good reason these are 65kA versions.
 
kwired said:
Both part of QO product line.

If the part number is QO followed by numbers only it is 10kAIC rated

If the part number ends with VH it is 22kAIC.

If the part number begins with QOH it is 42kAIC

If it begins with QH it is 65kAIC

If there is a B in the number it is a bolt on breaker.

As mentioned panelboards for the past 30-40 years generally accept bolt on or plug on. "Load centers" have always been plug on only. Panelboards over ~40 years old possibly are bolt on only.
Click to expand...

Very informative, thank you!

Looks like I gotta head up there anyway and find out if they are bolt on.
 
Seven-Delta-FortyOne said:
So what is the difference between the QO and the QH series? Is one more geared for commercial/industrial?
Click to expand...
QO is the series.
QO is 10kAIC
QO_VH is 22kAIC
QH is the 65kAIC

QO panels are loadcenters and are plug-on only.
NQ--- panels are panelboards.
NQO were built into the 80s and were plug on only
NQOB were built into the 80s and were bolt-on only
NQOD were built from the 80s to the 90s and accepted both plug on and bolt-on.
NQD have been built since the 90s(?) and also accept both plug and bolt-on.
 
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