What is it square D

[Jerseydaze]

OK ran into this old square D panel in a home had a lot of paint on it i want to say it was NMo Or Neo anyone know this panel if I can get breakers and how the breakers install . The breakers had a metal plate that covered 4 handles and the 2 poles did not have common handle ties any help appreciated.

 

[marcerrin]

got a picture?

 

[mdshunk]

Sounds like an old "Multibreaker" panel. They're from the 30's.

If it's more modern than that, is it possible you were looking at an NQO panel with some 3rd party accessory?

 

[jim dungar]

Sounds like an old "Multibreaker" panel. They're from the 30's.

If it's more modern than that, is it possible you were looking at an NQO panel with some 3rd party accessory?

From the 30-50's Square D offered an MO panel which was called a multi-open breaker. The common MO was four breakers mounted on a single front plate, although there were other variations. These were replaced by the XO family in the 40-50's and finally by QO in the late 50's.

 

[mdshunk]

Here's a list of all the obsolete Square D breaker types. I wish it had pictures, but it does not. http://ecatalog.squared.com/catalog/174S/html/sections/11/SD17411002.html

I had to replace a Square D panel one time just to add some circuits because nobody knew what the breakers were (not even the rep). The panel didn't appear to be all that old.

 

[mdshunk]

Here's some pictures of some weird Square D stuff. The first two are what I think is are A1B breakers. The third and fourth are of the short-lived "backstab" breaker. I don't know what that breaker was called. The one in the picture is even a tandem. The last pic is a box of old XO breakers for special occasions.

 

[480sparky]

Here's some pictures of some weird Square D stuff. The first two are what I think is are A1B breakers. The third and fourth are of the short-lived "backstab" breaker. I don't know what that breaker was called. The one in the picture is even a tandem. The last pic is a box of old XO breakers for special occasions.

Last made during the Kennedy Admin.

 

[electricalperson]

i like those backstab breakers. was there ever any problems with those?

 

[mdshunk]

i like those backstab breakers. was there ever any problems with those?

I don't personally know of any, but they're rare as hen's teeth, so there aren't that many in service to possibly fail.

 

[jim dungar]

The A1B breaker was the 240V commercial breaker at the time the XO was the residential breaker until they were replaced by the QO and Q1 family. A1B breakers were installed in NA1B panelboards. Its 277V equivalent was the Y1B.

The back stab breaker was part of the QO family. The front to back tandem design existed until the mid 80's. The back stab I think was still offered in the late 70's.

In the late 60's, Square D sold the rights to the XO style to Cutler Hammer who made them into the 70's.

At my office, I have pictures of Square D breakers and panels back to the 30's

 

[norcal]

The A1B breaker was the 240V commercial breaker at the time the XO was the residential breaker until they were replaced by the QO and Q1 family. A1B breakers were installed in NA1B panelboards. Its 277V equivalent was the Y1B.

The back stab breaker was part of the QO family. The front to back tandem design existed until the mid 80's. The back stab I think was still offered in the late 70's.

In the late 60's, Square D sold the rights to the XO style to Cutler Hammer who made them into the 70's.

At my office, I have pictures of Square D breakers and panels back to the 30's

Cutler-Hammer built XO panels in the 1950's locally there are subdivisions full of them, by about 1960 they were fully obsolete. The Multi-Breakers were also built by Sq D, Cutler-Hammer, Westinghouse, Colt, and I assume others, My house was built 1943, and did have a couple small Sq D Multi-Breaker panels installed in the kitchen. (4 circuits for the whole house).

Sq D used to tool up once a year & build XO replacements in the 70's I bought a XO 120 and thought how pricey they were @ $8.00 ea.

 

[marcerrin]

OK ran into this old square D panel in a home had a lot of paint on it i want to say it was NMo Or Neo anyone know this panel if I can get breakers and how the breakers install . The breakers had a metal plate that covered 4 handles and the 2 poles did not have common handle ties any help appreciated.

I think I have a few laying around the shop. How many, and what size do you need?

 

[Jerseydaze]

I am looking for a 2 pole 50 or 60 I know for sure this is not an XO

 

[jim dungar]

I am looking for a 2 pole 50 or 60 I know for sure this is not an XO

If the breakers are mounted directly to the cover of the panel it is a MO breaker.