Quote:
Originally Posted by WINNOCTURN
I use an interlock setup on my panel. I prefer it to a transfer switch with a limited number of circuits available. With the interlock you can use of any circuit with in reason. One important aspect of setting up the panel is to balance the load on each "leg" L1 and L2. As you go down the panel each breaker is on a different Leg. You do not want two heavy Load appliances on the same leg, say the electric stove and a well pump. It takes more time moving breakers around to get a balanced load than installing the interlock, running the cable from the outside receptacle and wiring the panel.
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WINNOCTURN, when balancing loads it is based on continuous rating. Note that if you add up all the breaker current ratings that they greatly exceed the 200A rating. You would have to know exactly how long each light and appliance is running and at what times to "balance" the loads. In most cases, it's impossible to do.
Also, the buses are designed to more or less balance the loads for you (notice how the tabs alternate). The balanced load concept is a hold-over from the old days with 60A fuse panels.
This conversation could get really in-depth but this is what I do for a living.