Clean commercial electrical room with organized distribution panels.

LOAD STUDIES · INFRARED THERMOGRAPHY · ELECTRICAL INSPECTIONS

Branch Circuit Installation in Phoenix, Arizona

New circuits for equipment, receptacles and lighting, sized to the load and checked against the panel before the first wire is pulled.

Request a Consultation (602) 564-1144

Does my panel have room for a new circuit?

Not always. An open breaker space does not mean the panel and service can carry more load. Before we run a new circuit we check the space, the panel rating and the actual demand. If the numbers do not work, a panel upgrade or service upgrade comes first, and measured data from a load study shows how much margin you really have.

What kinds of branch circuits do we install?

  • Dedicated circuits for machines, compressors, ovens and other fixed equipment
  • Receptacle circuits for offices, retail floors and workshops
  • Lighting circuits, including wiring for LED retrofits
  • Circuits for server rooms and network closets
  • 208 volt and 480 volt three-phase circuits for motors and larger equipment

How are commercial circuits sized?

Wire size comes from the load, the length of the run and the conditions along the way. A load that runs three hours or more counts as continuous, and the circuit has to be sized at 125 percent of that load. On long runs in a warehouse or large shop, voltage drop can call for a larger conductor than the breaker alone would suggest. The wire, the breaker and the device at the end all have to match.

What does a branch circuit job look like?

  1. Walk-through to confirm the load, the location and the panel
  2. Route planning and permit, where your city requires one
  3. Conduit and wire rough-in, using EMT, MC cable or rigid as the space calls for
  4. Terminations, labeling and testing, including GFCI or AFCI protection where required
  5. Inspection and an updated panel schedule

When do businesses add circuits?

Tenant build-outs, new production equipment, added workstations and the moment a power strip or extension cord has become a permanent part of the layout. If a breaker keeps tripping after you add equipment, the cause may be the total load rather than the circuit, and power monitoring can show which.

This work is part of our Commercial Electrical Services.

Arizona ROC #153656 (CR-11) | Over 40 years in business

OUR PROCESS

HOW DOES A JOB WITH PHOENIX CONTRACTING SERVICES WORK?

Every job follows three steps: a site walkthrough, testing and documentation, then findings and next steps.

01

WALKTHROUGH AND SCOPE

We start with a free phone consultation, and you can send a photo of your panel or equipment. If on-site work is needed, we visit, look at the panels and service, and agree on what needs to be tested or repaired before any work starts. On-site work is quoted before it begins.

02

TESTING AND DOCUMENTATION

Load loggers and a thermal camera record what the equipment is doing, and the results are documented for each panel or component we check.

03

FINDINGS AND NEXT STEPS

We go over what we found and your options in plain language. If corrective work is needed, we are licensed to do it.

WHAT CUSTOMERS SAY ABOUT US

5.0 VERIFIED GOOGLE RATING
It actually started in Fall 2020 with my Garage losing power. I bid out the work and hired Phoenix Contracting Services. The following Monday, Jeff and his crew (Mike and Gabriel) came out and finally resolved the issue See more
Tom Thompson Google review
Jeff’s knowledge, experience and professionalism are exemplary! We contracted him to provide engineering plans to permit our relocation and upgrade of electrical service meter. He worked with my electricians on details See more
Jacqueline Google review
We woke to a Friday morning with weird lighting fluctuations. I checked the service panel to find a burning smell and melted bus bar under AC breaker. Since bus bar was melted, I contacted SRP who provided some certified See more
Mike Silva Google review

Can you add circuits while my business stays open?
Usually yes. Most rough-in work can happen around your hours, and we schedule the short shutdown for panel tie-ins at a time that suits you.
How many circuits can my panel take?
It depends on the panel rating, the open spaces and the real demand on the system, not on the open spaces alone. We check all three before quoting.
Do new commercial circuits need a permit?
In most Phoenix-area cities they do. We confirm your city's requirement when we quote the job.
Why would a breaker trip after I add a circuit?
Often because the panel or feeder feeding it is already near its limit. The new circuit itself may be fine.
Do you label the new circuits?
Yes. Every circuit is labeled at the panel and the panel schedule is updated, so the next person to work on it can find what they need.

Tell Us What Your Electrical System Needs

Share the details of your project, and our team will help you identify the most practical next step.

Request a Consultation (602) 564-1144