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I have often wondered that too. The house next door has one but I really never understood why. Do they still make them?
Thanks LC
 

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6 throw rule. Cheaper to have a 60 amp main over a 100, 125, 150 or 200amp main.

Dumb idea, since a whole lot went wrong.
Yup. 100A MLO with appliances at the top and a 60A feeding the GP loads on the lower buss. Novel idea, but they end up getting loaded with tandems top and bottom buss anyway. :laughing:
 

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I had one in Ohio years ago, it was nice to shut off the bus for changing breakers and maintenance but still have lighting. Not a big deal but kinda cool.
That would be backwards.
The lighting bus breaker was one of the mains, stove, water heater, pump, etc were also mains. Up to six throws.
I don't see the harm in them, it was kind of a slick idea.

I had an engineer turn one down saying that someone modified the bus, and described exactly what a split bus panel was. I called him and asked him about it. His response was, of course I know what a split bus panel is. I think he was full of poo poo.
 

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felonious smile.
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I recycle the guts of them. They come in handy for lighting panels. I did a $30k landscape line voltage job. I used the bottom half for pc controlled lights. I hit a contactor in between.
 

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The split buss panels were all about being cheaper, in both usages of the word. A lot of the split buss panel installers were also the aluminum Romex jerkers.

I never installed either, but have seen plenty of both.
 
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