D-tub Safety

* all rules of a public bathing facility will be met: automatic chlorine feeder, bather load monitoring, PH tests, on-board shower required for tub entry,
* electrical safety: low-voltage power system (24V), GFCI protection, pumps operated off air buttons
* 3' ladder to lowest level of vehicle, code-compliant stairs with railings above 3'
* vehicle GVWR is 15000 lbs, but only loaded to an estimated 9000 lbs, giving a wide margin for braking safety.

http://www.fmcsa.dot.gov/rules-regulations/administration/fmcsr/571.305.htm

"This electrical isolation value (in ohms) divided by the nominal operating voltage of the propulsion battery (in volts) must be equal to or greater than 500."

At 24 volts, the isolation only has to be 12k ohms.

Just because it's safe doesn't mean it's legal, and vice versa.  Lots more to write on this topic.

These are the regulations under which I'm likely to be pulled over:

2804.   A member of the California Highway Patrol upon reasonable belief that any vehicle is being operated in violation of any provisions of this code or is in such unsafe condition as to endanger any person, may require the driver of the vehicle to stop and submit to an inspection of the vehicle, and its equipment, license plates, and registration card.

2806.   Any regularly employed and salaried police officer or deputy sheriff, or any reserve police officer or reserve deputy sheriff listed in Section 830.6 of the Penal Code, having reasonable cause to believe that any vehicle or combination of vehicles is not equipped as required by this code or is in any unsafe condition as to endanger any person, may require the driver to stop and submit the vehicle or combination of vehicles to an inspection and those tests as may be appropriate to determine the safety to persons and compliance with the code.

I could be cited under 24002(a), " It is unlawful to operate any vehicle or combination of vehicles which is in an unsafe condition, or which is not safely loaded, and which presents an immediate safety hazard", but this is just an infraction.  I could also be told to drain the water out of the tub:

"2803.   (a) If the traffic officer determines that the vehicle is not safely loaded or that the height, width, length, or weight is unlawful, he may require the driver to stop in a suitable place and reload or remove such portion of the load as may be necessary to render the load safe or to reduce it to the limits permitted under this code"

Taking pictures of the system at high load angles, and trying to stress how much work has gone into making this safe, should help.  I think there'll be a packet of information in the glove box to hand to an officer, with pictures of the system under stress to reassure him or her that it is, in fact, safe.