Fire Suppression System Micro Switch Testing
Fire suppression systems many times need to do more than just shut down the MAU. They also must shut down any electrical under the hood (typically required with the new wet systems, no so much w/the old halon), and may even need to trigger the fire alarm system. Pretty tall order for a part with a wholesale cost of $1.37. There are some systems that have a sum total of two microswitches, but it still falls on the electrician to make the system function as required.
If the electrician on site is unable to figure out how to accomplish all this, perhaps the owner/GC should find someone qualified.