Bus Plug Fusing...
Bus Plug Fusing...
(OP)
Currently I have a 600V Westinghouse Bus Duct in a particular area of the plant. One 200A rated, 150A fused bus plug feeds two identical pieces of equipment. The majority of the equipment load is a 40hp motor in each machine. The protection at the machine is either a 60A time delay fuse or a 100A breaker (it varies by machine). Does this pairing of loads on one bus plug break any code requirements? I am in Ontario but if this is a problem, I would think it would be anywhere. Thanks.
CAF
CAF






RE: Bus Plug Fusing...
I can't see any problem, as long as each cable from the bus plug is suitable protected by the 150A fuse. The fact that each machine then has a smaller fuse (60A or 100A) means that if that blows, the other machine is left unaffected. Obviously I haven't done any calculations for this, but in principle is is totally acceptable.
Brian
RE: Bus Plug Fusing...
Sorry, I forgot to mention; I practise in the UK, not Ontario!
Brian
RE: Bus Plug Fusing...
RE: Bus Plug Fusing...