D DAWGS Senior Member Location Virginia Apr 24, 2009 #1 Is it permissive to feed a 200A disconnect with a 225A breaker? What about a fusible disco. Would this fall under tap rule? We need to run about 100' from panelboard to disconnect and the plant wants to use a spare 225A breaker to feed the disco.
Is it permissive to feed a 200A disconnect with a 225A breaker? What about a fusible disco. Would this fall under tap rule? We need to run about 100' from panelboard to disconnect and the plant wants to use a spare 225A breaker to feed the disco.
barbeer Senior Member Location Pinellas County, FL Apr 24, 2009 #2 Without digging in to the book- I would say o.k. assuming the conductors were good for 225 and the disco was fused at what it was rated for (200?)
Without digging in to the book- I would say o.k. assuming the conductors were good for 225 and the disco was fused at what it was rated for (200?)
D DAWGS Senior Member Location Virginia Apr 24, 2009 #4 Found out 200A disco was nonfusible, so we will install a new 200A breaker instead of using the 225A.
Found out 200A disco was nonfusible, so we will install a new 200A breaker instead of using the 225A.
J jim dungar Moderator Staff member Location Wisconsin Occupation PE (Retired) - Power Systems Apr 24, 2009 #5 Good idea.
H hillbilly Senior Member Apr 25, 2009 #6 danger30 said: your OK if you feed it with 4/0 Click to expand... Copper.:smile: steve