I'm short on spaces in my current load center and I can either add a
subpanel (quick and cheap) or replace the entire load center by a
bigger one rated for 200A (more expensive but cleaner). The current
load center is protected by 100A CRN fuses instead of a main breaker,
so my guess is that it's old anyway.
As I don't want to have to have my whole electrical service replaced,
a subpanel will make a good mid term solution.
But I'd like to know how much current I can get from my service drop.
The entry point itself is protected by two NRN 150A fuses, but that
last upgrade probably goes back to the 70s and I don't know if the
electrician back then put the biggest fuses he could. The counter is
rated at 200A.
I saw a few tables that indicate that I need 4/0AL cable coming in,
but how the heck am I supposed to verify what type of cable I have? I
checked the exposed envelope of the cables coming in and can't read
anything about their rating. Any suggestions?
Thanks, I'll summarize.