The scenario
A whole-house backup system connects a 22 kW standby generator and utility service through a 200 A ATS to a main panel, supplying five residential branch circuits.
What is in this drawing
Read the decisions behind it.
01
Locate ATS between utility main disconnect and main panel bus
02
Use a 100 A generator output breaker for the 22 kW generator at 240 V
03
Separate branch feeders for lighting, kitchen, A/C, laundry, and general loads
Use for residential or small commercial standby generator single-line diagrams with whole-house transfer switching.
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