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Main Electrical Panel Services in San Antonio

What’s with This Metal Box with Switches in My Garage?

The main electrical panel is the heart of your home’s electrical system, and your distribution point for all the electric circuits in your home. It’s so important, that we guarantee your electrical panel and main service replacement project will be completed on or before the date we promised. We guarantee our workmanship for a period of 3 years or more. If your panel or service gives you any trouble at any time during that period, we will repair the problem free of charge. We guarantee that all materials used will be as specified and up to the code in your area. And, we guarantee to protect the condition of your home.

What Is a Main Electrical Panel?

As you add electrical appliances and circuits, you increase the demand on your power panel. Depending on when your home was built and how much electricity you use, your power panel may need to be replaced or a sub-panel added to keep up with demand.

All of the power for your home comes through this panel from the utility company, to the exit wires that split off and service different parts of the house. These exit wires are called branch circuits or branch wire circuits. Service wire lugs connect the power from the utility through the electric meter to the electrical panel, and are highly dangerous points that should never be touched. The main electrical panel is the central distribution point for all branch circuits of the house.

Branch circuits are connected to the service panel via circuit breakers. The circuit breakers have no purpose other than safety, since they immediately cut off electricity to branch circuits in the event of overload. You can access these circuit breakers and turn them on and off to restrict power to a particular circuit in your home.

The service wire lugs connect the power from the utility to your home and contain intense, concentrated power. It is impossible to turn off the power to the service wire lugs. Main service is continually on, except in the event of an overall power failure, or if you make a special request with the utility company to shut off power from the street.

Unlike branch wire circuits, which are just a portion of the entire electrical service to the house, the service wire lugs represent every single amount of electricity coming into the house. If your home has a screw-in fuse panel, an obsolete panel, or even worse, has lost its UL listing due to a faulty main breaker or circuit breaker—you may have to consider a new electrical panel for your home. Installing a new electrical panel in your home will increase your safety and peace of mind knowing that the heart of your electrical system is working properly for you and your home.

Components of main electrical panels include; the housing unit, panel door, circuit breakers, hot bus bars, neutral bar, ground wire and a ground bar. Changing out or upgrading your electrical service is a job for an experienced electrician.

Call our experienced electricians at Mister Sparky® of San Antonio, and we’ll go over your options with you.

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Sparks Fly Between Us and Our Customers

4.8

3842 reviews

4.8

3842 reviews

Sparks Fly Between Us and Our Customers

Read Our Reviews

Andre Jones

Ant and Mark did an excellent job servicing my home today. They came out to give an estimate on my issue with no power to my water heater. They found that the water heater breaker was tripping and not resetting. I provided the breaker and they replaced that for me but they noticed in the laundry room was missing a bushing and the grounding wasn’t up to par along with a loose box. They did a great job of letting me know the issues and provided options for me. I will be recommending to family and friends the great work they completed for me. I now have hot water ; and now a happy customer!

Vanessa Vazquez

Thank you Luciano for scheduling my mounting quote appointment promptly and efficiently. Kevin showed up and did an amazing job with the inspection he provided for our new home. Kevin was very knowledgeable and really seemed passionate about his work. I appreciate the great service!

Uriah Meyer

My experience with The Mister Sparky team was great. I had an urgent issue with my outdoor panel following an home inspection and Timothy was on scene a couple of hours later. He took diagnostics and made sure all my questions were answered. The second day Keith and Matthew arrived and worked together to resolve issues in both our house panels. They were both professional and responsive and took their time afterwards to review their work with me.

Sam Small

Frank arrived, assessed the situation, and gave me options for what I want completed. He explained all options and once I made the decision, he went to work like a Boss! He was pleasant to talk with and answered all questions completely. What I liked most, he enjoyed doing what he knows how to do. He deserves a bonus! Thank you Frank and staff for getting here as quick as you did to complete an urgent matter. You’re tops in my book. Mr. Sparky will be my first and only call when service is required. OUTSTANDING!

Victoria Rambo

New update 11/7/25- I had Mister Sparky out again for new electrical tasks since my first review. Again very pleased and will continue to call them for my needs. This time I had Matthew and team and it was a big job and they were extremely professional and respectful (and did a great job) Original review: Very pleased- Art was my electrician and he was so kind and professional. He did a great job hanging a very big light fixture on a very tall ceiling.

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