Standby Generator Sizing 702.4 (b)(2)(a)

[Fred B]

Can I ask why even do a load calc when you can get peak demand from powercompany???? There an allowance for that!

None of the POCO around here give that level of information.

 

[Seven-Delta-FortyOne]

My theory for why portable backup generators pass without load calcs, is that inspectors are more comfortable with listing requirements than code. Excluding listings for equipment having wheels in 445.6 leaves inspectors with a fragmented topic, across multiple articles, which are ignored.

It states specifically that installations with manual transfer equipment are not required to handle the entire load, so no load Calc would be required.

I have yet to see a home owner with a portable generator with two wire start capability and an ATS.