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#178705 06/09/08 09:17 PM
Joined: Dec 2001
Posts: 444
S
Sandro Offline OP
Member
300 mcm T90Nylon is rated for 295amps. Using the 5% rule, one could use parallel 300mcm runs for a 600 amp service?

Sandro #178706 06/09/08 10:22 PM
Joined: Mar 2004
Posts: 947
T
twh Offline
Member
If your calculated demand is 620 amps, you can put in a 590 amp service, which would be fused at 600 amps according to 14-104, if a 590 amp fuse is not available. That is, you can install a 590 amp service and fuse it at 600 amps.

twh #178920 06/15/08 09:32 PM
Joined: Apr 2003
Posts: 13
T
Junior Member
Generally if you are considering applying the 5% rule I would first run it by your local inspector. Yes, it is a rule but doing so makes for a better relationship, especially if you don't know him/her.


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