fla sparkey That is very true, but that type of generator is not an emergency generator (Article 700) to the NEC.

This would be an optional standby unit (Article 702), as such fuel choice and amount of run time is entirely up to the people paying the bill. [Linked Image]

If you are involved with selling a genset you could certainly let the customer know about the availability of diesel over propane.

The NEC is not concerned with keeping refrigerators running. [Linked Image]

Even if this was an 'emergency' generator the NEC only requires 2 hours worth of fuel on site.

Bob

Bob Badger
Construction & Maintenance Electrician
Massachusetts