Generator Installation Guide Install generators safely and to code with this comprehensive guide covering NEC 702, 445, and 250 requirements, installation steps, and testing protocols for single-phase residential systems up to 20 kW.
Code Reference (NEC) NEC 702 – Optional Standby Systems NEC 445 – Generators NEC 250 – Grounding and bonding NEC 110.20 – Transfer equipment ratings Generator Requirements Single-phase residential generators Compatible start/stop control (if auto-start) Proper grounding and neutral configuration ≤ 20 kW Installation Steps Install generator breaker in designated slot Land L1, L2, Neutral, Ground on designated terminals Install generator CTs if required Connect auto-start wiring if applicable Keep auto-start wiring isolated from HV conductors Testing Simulate outage Confirm generator start and load acceptance Verify priority circuits behave correctly NEC Code
