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Home Portable Generator Sub-Panel Installation Copyright-GeneratorPanel-460x613-IMG_6577

Copyright-GeneratorPanel-460×613-IMG_6577

The arrow indicates the change from two single pole circuit breakers to one, two pole, 30 amp circuit breaker to feed the new generator sub-panel.

Here is the Square D generator sub-panel completed and labeled.

The two 30 amp main circuit breakers with the interlock device between them. Note the twin circuit breakers for the branch circuits. Notice that the circuit breakers for the furnace and basement lights are connected with a handle tie. This is required by article 210.4(B) of the National Electrical Codebecause these circuits are a multiwire branch circuit.
The upper arrow points to the 10/3 Romex cable that is coming from the generator inlet mounted outside which will supply power to the generator sub-panel from the generator when needed. The lower arrow points to the 10/3 Romex cable that is coming from the main panel to feed the Square D generator sub-panel on street power.