generator rating

[Charlie Bob]

I was asked to hook up a generator as a back up for a customer.
The generator is rated 7000 w with a L14-30 for a 220v plug.

I take i have to go by the plug, and install a double pole 30 amp. breaker at the panel.

One more thing i need to use 240 v on my calculation instead 120, right?.
7000/240= 29.1666.

 

[chris kennedy]

One more thing i need to use 240 v on my calculation instead 120, right?.
7000/240= 29.1666.

And that is usually peak not continuous, check the manual.

 

[roger]

I take i have to go by the plug, and install a double pole 30 amp. breaker at the panel.

There is more to it than that, you will have to provide a means to prevent the inadvertent interconnection of normal and alternate sources of supply, this could be a transfer switch or an interlock kit, see 702.6

Roger

 

[Charlie Bob]

Chris the generator says 8500 w peak and 7000 w continuos.

 

[Charlie Bob]

Roger i was trying to keep the post simple, i will be using the interlock kit though. i wanted to make sure the right calculation was 7000w/240v.

 

[roger]

i wanted to make sure the right calculation was 7000w/240v.

As Chris stated, the generator will have the information on this, they usually show max KW for 240 and 120 v loading.

Roger