Monte Power & Electric handles commercial three-phase service entrance and main distribution panel upgrades across San Jose and the South Bay. 600A, 800A, 1,200A, and 1,600A switchgear, 208V and 480V configurations, transformer coordination, and full PG&E primary handoff. Licensed C-10, fully insured, Net 30/60 commercial terms.
What we do
Three-phase commercial service entrance is the upstream piece for almost every commercial scope: tenant improvements, manufacturing fit-outs, multi-tenant rebuilds, restaurant kitchens, medical and lab facilities, and machine shops. Monte Power & Electric handles the full scope from PG&E coordination through main distribution and downstream feeder panels.
Sizing depends on the building's connected and demand load, the equipment list, and the future projects on the property. We size the service so the next tenant build doesn't trigger a second upgrade. Transformer scope, switchgear, distribution panel, primary and secondary conductors, grounding, and AHJ closeout all in one engagement.
By configuration
Commercial three-phase comes in two voltages and a range of capacities. Walk us through the building, the loads, and the future plans, and we'll spec the right service.
Multi-tenant + small commercial
Multi-tenant retail, small office, restaurant build, and light commercial. 208Y/120V four-wire is the standard. Frequently the upgrade target for older 200A and 400A commercial services.
Mid-size commercial
Mid-size office, larger retail, mid-tier manufacturing, mixed-use buildings, and mid-density tenant improvements. Common at 480Y/277V with step-down transformers feeding 208V tenant distribution.
Manufacturing + larger TI
Manufacturing fit-outs, machine shops, larger tenant improvements, multi-floor commercial, and high-load food service. PG&E pad-mount coordination is part of the scope on most of these.
Heavy industrial
Heavy manufacturing, biotech and medical device facilities, larger multi-tenant commercial buildings, and dense tenant improvements with significant 480V process load. Switchgear lead time runs four to twelve weeks.
When commercial service needs upsizing
Most commercial three-phase upgrade calls trace to one of these patterns. Some are tenant-driven. Some are AHJ or carrier-driven. All of them slow the next project down if the service stays as is.
How a commercial three-phase upgrade goes
Same disciplined sequence whether the project is a 600A multi-tenant rebuild or a 1,600A manufacturing service.
Load schedule and equipment list reviewed. Site walk to confirm gear location, conduit routing, and PG&E pad position. AHJ rules checked.
Itemized quote with line items for switchgear, transformer, primary and secondary conductors, conduit, grounding, AHJ permit, and PG&E coordination.
Electrical permit pulled. PG&E planning kicked off in parallel. Switchgear ordered with lead time confirmed.
Switchgear set, conductors pulled, transformer mounted, distribution panels installed. Two to five day install window once gear is on site.
Insulation resistance test, voltage and rotation check, load energized in stages. Final AHJ inspection. As-built one-line and closeout package delivered.
Quick answers
Six of the most-asked. More on the dedicated contact page or by phone.
Ready when you are
Send the load schedule, the equipment list, and the timeline. We'll come back with switchgear sizing, PG&E coordination, and a date.
