For your electrical work, the electrician should size your wiring to experience a voltage drop of less than 3% at the motors. That is dependent on the amps being drawn, the length of the wire, and the gauge of the wire.
Some electrical motors require significantly more "starting" amps than "running" amps. For example, the compressor unit for your home air conditioner draws so many amps at start-up, that there is a capacitor in the unit to provide the required electrical boost.
I do NOT know if the aeration compressor or the fountain have significantly higher "starting" electrical draws. Hopefully, esshup or one of our other experts can address that issue.
