The NEC typically requires a minimum 2-foot gap between generators and property boundaries. This spacing helps in mitigating acoustic impact on neighbors and provides accessible space for inspection and maintenance without encroaching on adjacent properties. . Clearance requirements help ensure the generator is operated at a safe distance where heat and fumes will not cause fires or health hazards. Flammable material may ignite and burn from the heat of the exhaust system. AHJ's recommend that a system installer maintain the 5 foot separation wherever possible and only rely on the exceptions when absolutely necessary for a particular. . The generator set for test case, shown in Figure 5, is a 1250 kW with a horizontal discharge and the exhaust outlet out the top of the enclosure. Like case 1, a parametric study was performed focusing just on the wall dimensions.
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