Carrying gasoline for generator

Sounds like the person you talked to didn't know the law.
Fmcsa covers auxiliary fuel tanks right here § 393.67
Its not a grey area.

 

The rules in this section apply to tanks containing or supplying fuel for the operation of commercial motor vehicles or for the operation of auxiliary equipment installed on, or used in connection with commercial motor vehicles.

That bold underlined part covers a gas generator on a diesel truck. You are wrong and the people that gave you that information are wrong. Anyone agreeing with you is also wrong.

 

So is 10 gallons haz or not?

I really don't want to keep my endorsement just so I can drive my car.

 

I just read all of 363. Nowhere does it deal with this directly.
I also read it the way you are, I wanted to put a 25 gal take on the frame, I was told I wasnt allowed and made the calls. Not 1 call, several, and asked at the scales, not 1, several. A couple scale offices said they didnt know, but most said 8gal. At that point I gave up, it's not worth the risk of fines and out of service.
This is not my OPINION, it's the words of the officers I spoke to. It's not what I wanted to hear, but ya cant always get what you want.
MAYBE, their view on it has changed in 4 years. Let me know, I'd still love to do it myself.
I just didnt want to be the Guinea pig.
Have a great day.

 

Wow, really? That's the best you have? "Let's compare apples to oranges shall we, it's the most intelligent thing I can do"

 

The law covers gasoline auxiliary fuel tanks directly it's right there in 393.67
Did you reference 393.67 and tell them explain that to you if I can't have a bigger tank then explain that section?
If you read 363 no wonder you didn't see it lol.

The section you posted about 8 gallons clearly says cargo and says shipper and other things. the section you're quoting clearly has nothing to do with what we're talking about.

 

There are no regulations that state the size of a non cargo compliant fuel container permanently mounted as a part of a vehicle.

393.67 Liquid fuel tanks - gives the regulation governing the fuel tank.

571.301 Standard No. 301; Fuel system integrity - gives the general requirements for fuel system integration on the vehicle. It is used also for >10k gvw vehicles.

it is not a cargo tank - 178.320 General requirements applicable to all DOT specification cargo tank motor vehicles.

As for placarding and consideration of it being hazmat even if it is over 8 gallons, well no.

 

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