DIYbanter - View Single Post

According to :

The advantage to a copper conductor from the meter can to breaker box
is minimizing resistance losses. Sure its not much but its still
wasted.

Ah, no. When using aluminum, you're switching to a higher gauge wire,
so the resistance will be about the same.

The issue with aluminum is poorly done/improper terminations. It's
less forgiving of sloppy workmanship than copper. Properly installed,
there are no issues with aluminum feeds.

Individual circuits with aluminum multiply the risk of poor workmanship,
so many/most juridictions no longer permit aluminum for branch circuits.
But with main feeds or subpanel feeds, they're still quite common.

I dont know of anyone who makes a 300 amp service

But 300A and 400A service drops _are_ common. So while they may not
make panels that big, there's nothing to prevent you from splitting
a (say) 400A drop to two 200A panels. If done to code...
--
Chris Lewis, Una confibula non set est
It's not just anyone who gets a Starship Cruiser class named after them.