Commercial Electrician in Santa Clara: Service Upgrades on the Silicon Valley Power Grid

A commercial service upgrade in Santa Clara looks a lot like one in San Jose until you call the utility. Most Santa Clara businesses buy power from Silicon Valley Power, the city's own electric utility, so the meter, the service size and the shutdown all get worked out with SVP instead of PG&E. This guide walks through how that changes the job for office, R&D and light-industrial buildings, and what a property manager or tenant should have ready before the first site walk.

Santa Clara runs its own electric utility

Silicon Valley Power is owned by the City of Santa Clara. An April 2026 SVP presentation put the system at roughly 61,000 electric accounts and 58 data centers, with data centers using about 55% of the power. SVP's draft resource plan forecasts annual load in 2035 at almost double today's.

For a building owner that matters in two ways. The utility engineering review on a service change happens at SVP, under SVP's own Rules and Regulations. And you are sharing a grid with some of the largest loads in the Bay Area, which is one more reason to bring the utility in early on any job that changes the service.

Our Santa Clara service area page covers the neighborhoods and corridors we work in. This post stays on the commercial service side.

Start with the load, before anyone talks amps

Every service upgrade question starts with one number: how much load the building actually carries today. Under NEC 220.87, which carries into the California Electrical Code, an existing building's load can be based on 12 months of utility demand data or a 30-day recording at 15-minute intervals, with a 125% factor applied before new load is added.

That measured number often shows the existing service has more room than the panel schedule suggests. Sometimes it shows the opposite. Either way, it is the number SVP and the plan reviewer will want to see. Our commercial load study guide explains how the recording works and how long it takes.

Then list what is coming: new HVAC, lab equipment, a production line, a bank of EV chargers. The gap between measured load and planned load decides whether you need a new service, a larger main, or just new distribution inside the building.

What SVP allows on one building

SVP Rule 9.A.4 sets the default: one electric service per building. A commercial or industrial customer can get more than one only when the existing main service already exceeds the maximum sizes in SVP's Table 9.1, or when a long or large building makes a single service impractical and the loads are too small for a 12kV service.

Table 9.1, as published in SVP's commercial charger guideline, lists these commercial maximums:

• Underground: 3,000A at 120/208V three-phase, and 4,000A at 480V or 480/277V three-phase
• Overhead: 1,200A at 120/208V or 120/240V three-phase, and 600A at 480V three-phase
• 12,000V and 60,000V services by agreement with SVP

In practice this pushes larger tenants toward 480/277V. Lighting and smaller loads then come off step-down transformers inside the building. If your space is single-phase today and new equipment needs three-phase, our three-phase service page covers the conversion options.

EV chargers go on the existing service first

SVP's guideline for commercial Level 2 and DC fast chargers is direct: new charger loads go on the existing service if it has adequate capacity. A separate meter for chargers is only considered under the Rule 9.A.4 conditions above, and SVP Electrical Engineering reviews those requests.

So the charger plan and the load calculation belong in the same conversation. Load management, sizing chargers at 125% as continuous load, and phasing the install over time can all keep a project inside the existing service. The commercial EV charger guide goes through those code items in detail.

Permits, plan review and Title 24

The City of Santa Clara Building Division issues electrical permits. Applications, plan uploads and inspection scheduling run through the City's Permitting Online Portal. Electrical can ride on a building permit as a sub-permit during a larger remodel, and every sub-permit has to be finaled before the building final.

If the job also touches lighting, California's Title 24 energy code applies to the altered lighting and controls. Monte Power & Electric prepares the NRCC and NRCA compliance paperwork and handles acceptance testing for commercial tenant improvements. For the broader TI picture, see the tenant improvement electrical guide.

How a Santa Clara service upgrade runs

The order of steps rarely changes from one building to the next:

1. Site walk. We survey the existing switchgear, the meter section, the transformer location and the routes for new conduit.
2. Load data. Twelve months of SVP demand history, or a 30-day recording if the history is missing or the building use has changed.
3. Design and utility review. Single-line drawing, load calculation and service request to SVP. The utility's answer sets the service size, metering and any work on their side of the point of service.
4. Permit. Plans go to the Building Division through the portal.
5. Equipment. Switchgear, panelboards and transformers get ordered once the design is approved. Lead times on large gear vary, so this step is often the longest wait.
6. Shutdown and cutover. The switch to the new service needs a planned outage coordinated with SVP. For occupied buildings we schedule it around tenants, often after hours or on a weekend.
7. Inspection and re-energize. City inspection, SVP sets or releases the meter, and the building comes back up on the new service.

Our commercial panel upgrade checklist covers the panel-level details that sit inside steps one through five.

What to send before the site walk

• The address and the SVP account or meter number
• 12 months of SVP bills or demand data, if you have access
• Photos of the main switchgear nameplate and the panel schedules
• The equipment list for whatever is being added, with nameplate voltage and amps
• Your target move-in or equipment delivery date
• Building rules for shutdowns, after-hours access and tenant notice

With that in hand, the first visit can answer the big question on the spot: does this fit on the service you have, or does SVP need to be part of the plan?

Frequently asked questions

Planning a service upgrade in Santa Clara?

Send the building details and we'll walk the gear, run the load numbers and map out the SVP side. Call 408-630-0548 or fill out the quote form to get on the schedule.