10kVA Transformer — Well Pump Step-Down, 300ft Run

This agricultural job required stepping down 3-phase 480V utility power to single-phase 240V for a well pump located 300 feet away from the source. That voltage conversion — and that distance — means you can't just run a circuit. You need a transformer sized for the load, properly mounted and protected, with disconnects on both sides.

The transformer is a 10kVA Hevi-Duty single-phase unit, tapped to convert 480V primary to 240V secondary. It's mounted on a Unistrut pole structure alongside a Siemens heavy-duty AC disconnect on the primary side and a 30-amp Siemens enclosed safety switch on the secondary — labeled clearly for anyone working the equipment. A solar circuit enclosure is also part of the assembly, indicating additional renewable integration at the site.

The 300-foot run to the pump required conduit routed across open agricultural land and terminated at a separate disconnect post adjacent to the concrete water storage tank. The pump disconnect at the field end is the local lockout point for anyone servicing the pump — required by code for equipment at that distance from the source.

Agricultural and commercial transformer work is a different category than residential electrical. The equipment is heavier, the voltages are higher, and the consequences of incorrect installation are serious. Every tap, termination, and overcurrent device was sized to the transformer's nameplate and the pump's load requirements.

This kind of job — rural property, agricultural infrastructure, 480V three-phase — is work that most electrical contractors won't touch. Cyber Electric handles commercial and agricultural scopes across the Central Valley.