I've never installed a fire pump without a disconnecting means.
Just how is the service tech going to be able to work on it now that OSHA has weighed in on hot work?
Try and get a hold of the FrenchElectrician: he's an expert on fire pumps.
All of my fire pumps were designed by a committee: the AHJ, FM, pipe fitters, pump techs, EE's all jumped in the soup. You have to make them all happy.
I've never seen any engineering short-cuts withstand the process.
They want what they want, and a contractors opinion counts as a negative.
I never try to design or tweak fire pump systems. You can't win.
