EMERGENCY FUEL SHUT OFFS

[Slade]

I KNOW THAT GASOLINE PUMPS ARE REQUIRED TO HAVE EMERGENCY FUELS SHUT OFF SWITCHES AND SO ARE GASOLINE & DIESEL DISPENSERS WHEN LOCATED TOGETHER. BUT MY QUESTION IS ARE JUST DIESEL PUMPS ALONE REQUIRED TO HAVE EMERGENCY FUEL SHUT OFF SWITCHES WHEN USED FOR FLEET VEHICLE FUELING?

 

[rbalex]

First, Welcome to the forums.

Second, please avoid ALL CAPS. They are percieved as shouting and make reading posts difficult.

Third, thanks for asking. I haven't given this a great deal of thought before; but, years a go I would probably have simply said, "No." Things have changed a bit. The various original NFPA sources for Article 514 have changed.

While electrical area classification based on diesel alone is unnecessary, the emergency shutoff is based on diesel simply being a fuel. Neither Article 514 nor NFPA 30A, the current Art 514 source, specifically excludes considering diesel as a fuel.

Pesonally, I believe emergency controls/shutoffs for all "fuels" in Motor Fuel Dispensing Facilities are required by the appropriate Sections in 514.11.

 

[Sandman1110]

It's true that the code makes no distinction concerning fuel for the disconnect.

However, it is interesting that 514.3 states that where the AHJ can determine that flammible liquids having a flash point below 38 C (100F) such as gasoline, will not be handled, such location shall not be required to be classified.

No. 2 Diesel is classified as a class II combustible with a flash point of 52C (125F). (source HMex Assistant)

So in effect, one could have a diesel fueling station that would be non-classified. yet would still have to comply with 514.11(A).