You can do that but you have to mind the cable sizes and have breakers
in the panels so that you don't overload the cable from the main
breaker. You could feed 2-100A panels off a 200A main breaker, but each
panel would need its own 100A breaker, sorta like feeding a 30A circuit
off a 200A panel, you need that 30A breaker in there so it does not pull
a full 200A. You can get a thingie (not sure what it is called) that
will screw onto the post off the load side of the 200A breaker, then
turns into two holes to slide your two panel feed cables into. Some
breaker panels have those two connections provided,. I got some of
those "adapters" to put on the load terminals of the meter panel to feed
my 2-200A panels.
Interesting, when I submitted my electrical plan, one of the guys in the
inspection office said I had made an error. A 400A meter is really a
320A meter, so he was concerned that 2x200A breakers/panels would
overload it. Not so, as the 200A breakers are rated at 80% ( 160A) to
trip, so that even if both breakers/panels were drawing full load they
would trip at 160A, keeping them in the 320A meter limit.
Here are some pics:
http://2.bp.blogspot.com/-7InQXxhJqg8/TfKWVSMCJoI/AAAAAAAAAjU/YW1BCciTyIY/s1600/DSC_0365.jpg
http://3.bp.blogspot.com/-IpbfZVsaA5E/TfKWWOamvjI/AAAAAAAAAjY/GsZapWeaseM/s1600/DSC_0366.jpg
http://3.bp.blogspot.com/-BubiliYBoPU/TfKWWiaT2HI/AAAAAAAAAjc/eZhdydDNCnk/s1600/DSC_0367.jpg
There are some interesting aspects to the electrical code once you dig
into it, but most of it is pretty logical. I am sure your code is
similar to the US National Electrical Code (which most all jurisdictions
adopt), I found some used books on Amazon for cheap that detail it all
-- sorta NEC for Dummies but oriented to field electricians and
training/reference. Same for plumbing...
--R
On 12/3/11 2:19 PM, Randy Bennell wrote:
I have wondered about putting in a main breaker and then some form of
splitter box and running a couple of 100A panels off of it. That way,
I could just leave my original panel in place and add another.
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