Here's the setting: We have a 400a. fused Service switch with double barrel lugs on the load side feeding two 200a. panels containing a 200a. main in each one. The wire supplying the 400a. switch are rated for 400a. and the wires feeding the 200a. panels are rated for 200a. I maintain that all wires are protected at their ampacity and that this is a common installation. This would be comparable to the rules for taps found in 240.21 where conductors are protected at their load ends instead of their source. My learned colleagues say "Can't do that, it ain't a tap" What say you guys?


George Little