kwired
Electron manager
- Location
- NE Nebraska
As mentioned, over 800 amps you can't go with next size up overcurrent protection.
This gets people in trouble when they think 500 copper is good for 400 amps and try to parallel three of them for 1200 amp, 4 for 1600...
Also as mentioned even on 800 amp application the load can't be over 760 or the conductor is still too small.
Then there is my earlier question of whether the application was a single 800 amp main or multiple smaller devices. If using the rule that allows up to six service disconnecting means - the conductors only need to be able to carry calculated load. So even if you add the overcurrent device ratings and come up with 800, if you only had 400 amps of calculated load you could legally only run 400 amp conductor for the common supply conductor.