3/3 for 100A
#1
Member
Thread Starter
3/3 for 100A
I currently have 3/3 nmd 7 for my 100A service. Is this enough? I think I saw it was only rated for 85A?
#4
Member
NMD7 is an older cable. The ground might be undersized by current codes, but would be grandfathered if currently installed. Non Metalic Dry. It is only allowed in dry locations. The current equivalent would be NMD90 or for USA peeps NM-B.
I don't know the service entrance codes that well but the table for #3 copper says for 60ºC #3 is only good for 85 amps. The 75ºC column says it is good for 100 amps.
I don't know the service entrance codes that well but the table for #3 copper says for 60ºC #3 is only good for 85 amps. The 75ºC column says it is good for 100 amps.
#5
Member
Thread Starter
This is an old installation so it's grandfathered in anyway. The cable is rated 90 degrees.
The service entrance cable goes to a disconnect and then this nmd wire.
The service entrance cable goes to a disconnect and then this nmd wire.