Commercial & industrial electrical contractors in San Marcos, San Diego County. Local electricians, upfront pricing and fast scheduling.
(833) 652-8933 Request a quoteBusinesses in San Marcos 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 San Marcos and across San Diego 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 San Marcos 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 San Marcos.
Machinery hookups, motor controls, VFDs, 480V distribution, warehouse high-bay LED retrofits, EV fleet charging and backup power. Also serving nearby Vista, Escondido, Rancho Santa Fe, Carlsbad. Call (833) 652-8933.
We provide commercial electrician throughout San Marcos and the surrounding communities of San Diego County.
Yes. Much of our commercial work in San Marcos is scheduled nights and weekends to avoid disrupting customers.
Yes. We prepare load calculations and drawings and manage plan check and inspections for San Marcos projects.
Yes, including hood and make-up air circuits, walk-in coolers, and dedicated equipment circuits.
“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.“Got a 200 amp panel upgrade and an EV charger in one day. They handled the permit and the inspector passed it on the first visit.”
Derek W.Upfront pricing · Same-day service · 24/7 emergency response