Rex Hungerford
Member
- Location
- Seattle
- Occupation
- Electrician
My customer has a 320A power meter on a residential home in Texas. He use to have a Iline distribution with 5 breakers to various panels. We are remodeling and have to change the service. I want to keep the meter socket but have to add a single outdoor disconnect.
If I add a single Fuse or CB disconnect, wouldn't it have to be 320A or less to protect the meter socket.
Fuses and CB standard sizes are 300, then 350. So do I size down to 300A.
Do I then rate my conductors from the meter to the disconnect at .83 x 320A = 265A for 300MCM copper at 75*
Then the feeder from my 300A fuse to the panel indoor is sized the same as the entire feeder is for a single family dwelling.
Thanks
If I add a single Fuse or CB disconnect, wouldn't it have to be 320A or less to protect the meter socket.
Fuses and CB standard sizes are 300, then 350. So do I size down to 300A.
Do I then rate my conductors from the meter to the disconnect at .83 x 320A = 265A for 300MCM copper at 75*
Then the feeder from my 300A fuse to the panel indoor is sized the same as the entire feeder is for a single family dwelling.
Thanks