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Old 11-12-2007, 06:05 PM   #1
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Default Split Buss Panels

I've heard a few references to split bus panels and I'm not sure I understand what this is. Could someone explain please?
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Old 11-12-2007, 06:26 PM   #2
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It's an old-style panel that was used in dwellings. It took advantage of the 6- disconnect rule.

The buss was split into (usually) 3 sections. At the top was a section, fed from the service wires, with space for 6 DP breakers. These are the service disconnects. 4 of these would feed 240v loads. (Range, dryer, etc.) 2 would feed the "lighting" sections below, where all the 120v loads would go.

Of course, over the years, some appliances would change to gas, eliminateing some of the DP breakers, and the spaces would be filled with SP breakers, violating the "6 handle" rule.

I hope this is (somewhat) clear.
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Old 11-12-2007, 06:27 PM   #3
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Oh, by the way, welcome to the Forum!
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Old 11-12-2007, 06:56 PM   #4
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I will put in few photos to show what it look like http://www.tpub.com/content/construc...4027_107_3.jpg

that one and let me get the other one http://www.tpub.com/content/construc...4027_107_2.jpg

that one show little more clearer on it

let me find one more or two

http://www.inspect-ny.com/fpe/stlou022.gif


this one is from the famous POS panelbox other manufacter will run very simuair arrangment but for new box they elemated [ removed ] that item due too easy to abuse the code with the 6 throw rules

Merci, Marc
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Old 11-12-2007, 07:28 PM   #5
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I'll never forget the day years ago when my green*** self ran into one of these. I thought I knew something about this here housewiring.
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Old 11-12-2007, 08:59 PM   #6
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Never seen one, but I get the idea. Thanks for the info. They don't still make these do they?
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Old 11-12-2007, 10:39 PM   #7
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Quote:
Originally Posted by goose134 View Post
Never seen one, but I get the idea. Thanks for the info. They don't still make these do they?
Not that I know of.
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Old 12-09-2007, 03:12 AM   #8
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Here is an old ugly split bus panel I recently replaced.

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Old 12-09-2007, 07:46 AM   #9
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I'm adding a new circut to one next week. It was a Murray which surprised me since I didn't know Murray ever made split buss panels. I tried to get the HO to upgrade but it was a no go. I hate working in them so I priced the job so I would't get it. Guess what, I got it anyway. I hate it when that happens.

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Old 12-09-2007, 07:58 AM   #10
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I have never seen a panel mounted sideways. Seems odd that I haven't, given some of the crap I have seen.
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Old 12-09-2007, 10:13 AM   #11
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Not trying to be a PIA, but the terminology is BUS not buss, copper bus, aluminum bus the confusion may come from the firm Bussman, which is now Cooper Bussman
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Old 12-09-2007, 11:06 AM   #12
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What is "bus" short for? Does it stand for anything?
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Old 12-09-2007, 01:57 PM   #13
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It comes from Latin for transport I THINK research this a few year ago.

From Wekipedia Which says you can also spell it BUS, but my electrical dictionary say BUS.

The name is a neologic version of the Latin omnibus, which means "transport for everyone."The name is a neologic version of the Latin omnibus, which means "transport for everyone."
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Old 12-09-2007, 07:58 PM   #14
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Quote:
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I have never seen a panel mounted sideways. Seems odd that I haven't, given some of the crap I have seen.
Maybe the installer did it on the side?
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Old 12-10-2007, 07:27 AM   #15
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Quote:
Originally Posted by LawnGuyLandSparky View Post
Maybe the installer did it on the side?

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Old 12-10-2007, 12:55 PM   #16
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I don't think I've ever seen a code reference against mounting a panel sideways. Other than, IMO, being a crappy job, are you allowed by code to mount a panel sideways?
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Old 12-10-2007, 07:15 PM   #17
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Too lazy to look for a code reference right now.

But, craftsmanship could be debated.

I was once told by an Inspector (doesn't nessacarily mean it is code) that all the writing on the labels in the back box must read from left to right and lettering should be right side up.
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Old 12-10-2007, 08:16 PM   #18
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2002 code 240.33 and 240.81 I see no reason why that couldnt have been mounted vertically.

~Matt
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Old 12-10-2007, 08:44 PM   #19
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Quote:
Originally Posted by TOOL_5150 View Post
2002 code 240.33 and 240.81 I see no reason why that couldnt have been mounted vertically.

~Matt
more shelf space mounted horizontal
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Old 12-11-2007, 03:46 PM   #20
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Quote:
I don't think I've ever seen a code reference against mounting a panel sideways
I believe the circuit breakers can't have the "off" position = up.


I've seen quite a few of these "side jobs" circa 1960 something.

I have no idea why they installed them that way.

Last edited by 220/221; 12-11-2007 at 03:50 PM.
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