Commercial & industrial electrical contractors in Diablo, Contra Costa County. Local electricians, upfront pricing and fast scheduling.
(833) 652-8933 Request a quoteBusinesses in Diablo cannot afford electrical downtime. Phasethree Electric is a commercial electrical contractor serving offices, retail stores, restaurants, warehouses, medical suites, schools and light industrial facilities in Diablo and across Contra Costa County with responsive repair, scheduled maintenance, tenant improvements and new construction electrical.
Tripping breakers on equipment circuits, lighting outages, failed contactors, parking lot lighting, sign circuits and emergency lighting tests. Maintenance agreements give Diablo businesses priority scheduling and after-hours work so you never close for electrical issues.
Design-build electrical for build-outs, panel and service upgrades, 3-phase distribution, dedicated equipment circuits, data and low-voltage rough-in, exit and emergency lighting and final inspection coordination with the City of Diablo.
Machinery hookups, motor controls, VFDs, 480V distribution, warehouse high-bay LED retrofits, EV fleet charging and backup power. Also serving nearby Danville, Alamo, San Ramon, Clayton. Call (833) 652-8933.
We provide commercial electrician throughout Diablo and the surrounding communities of Contra Costa County.
Yes. Much of our commercial work in Diablo is scheduled nights and weekends to avoid disrupting customers.
Yes. We prepare load calculations and drawings and manage plan check and inspections for Diablo projects.
Yes, including hood and make-up air circuits, walk-in coolers, and dedicated equipment circuits.
“Quoted me a firm price for recessed lighting in the kitchen and living room and the invoice matched to the dollar. Lights look fantastic.”
James O.“Whole house surge protector installed in under an hour. Peace of mind after the last PSPS event fried our garage opener.”
Ellen T.“Installed a Generac standby generator for wildfire season. Explained every step and the load management so we could use a smaller unit.”
Chris B.Upfront pricing · Same-day service · 24/7 emergency response