Breaker Lug Kit
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NEC and transfer switches--can I do this per code?
I want to install a transfer switch on my house. I have installed several before, but I want to install it in the main box (a 30/40 125 amp exterior, with 16 slots in use). Here is the plan:
--use the top 8 spaces for breakers I do not want on the transfer switch (dryer, garage sub, hvac, hall lights)
--Mount lugs to the bus bars in slots 9 and 10
THE BIG QUESTION--
--cut the bus bars just below the lugs so the top half of the box is disconnected from the bottom half
--Install a dp 60 (main) and dp 30 (generator) with a manual transfer interlock kit installed on them
--Wire lugs to the 60 amp breaker (#6 or larger) and wire in L14-30 male
--place rest of breakers in under transfer switch
AGAIN, the question is whether or not splitting the bus bar violates code.
As I am out of town and didn't bring my code book with me I can't quote you "chapter and verse". So I am having to rely on nearly 40 years experience when I say it violates code. It certainly does away with the UL listing. It also isn't the only/best way to go about accomplishing what you want to do. But I applaud your desire to install a transfer switch.
If I had more time available tonight I would give this more thought and one mans opinion on other options. Hopefully one of the other regulars will have time available.
To clarify something. The only panel I know of where spaces 9 & 10 would be next to each other would be Zinsco. Is that the brand you have? In all others (assuming single phase residential) the ninth space down would be # 17 ("A" phase) and the 10th space would be #19 ("B" phase) and you could put a 2 pole breaker there.
Got to go, sorry.
Breaker Boy Drums and Percussion
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