Field glossary

Separately derived system

A source, such as a generator behind a switched-neutral transfer switch, that needs its own single neutral-to-ground bond per NEC 250.30

Used across 4 Anvilfield field guides, most in Electrical.

Also defined as

A power source like a generator that feeds a panel or transfer switch, which changes where the neutral is bonded
A secondary with no direct connection to the supply, grounded on its own

Where this shows up