Circuits & Wiring Services in San Antonio

What’s Happens When I Flick the Light Switch?

When you think of the electrical wiring system of a house, you might know it consists of wires and circuits. These wires and circuits provide a 360-degree delivery of electricity from the main electrical panel to an outlet, or series of outlets that service appliances, and then flows back to the panel. The electric circuits in a standard house electrical wiring system in the United States is generally comprised of 120-volts or 240-volts.

House electrical wiring in the United States is governed by the National Electrical Code (NEC), which is published by the National Fire Protection Association (NFPA 70). As an example, the current code dictates that three-pronged, polarized receptacles are to be used in all new home construction, in addition to, outlining the use of ground fault interrupters (GFI) in locations where an electrical appliance may be subjected to moisture.

The standard household electrical outlet consists of two three-pronged receptacles. Each receptacle has a 120-volt ‘hot’ wire, a neutral wire and a ground. For higher power applications like clothes dryers, electric ranges and air conditioners, a single receptacle is used where two of the prongs are a hot wire and the third a neutral, which can be used to produce a 240-volt circuit.

The two receptacles in a common outlet receive power from the same circuit leading from the main electrical supply panel. They are wired together so that two appliances which are plugged into the receptacle receive the same voltage, but can draw different amounts of electric current. This parallel wiring is the standard for 120-volt circuits in the entire house, making possible the independent use of all appliances, supplied by the same voltage.

The wider prong on the plug will permit it to be plugged in only with the correct polarity. The narrower prong is the ‘hot’ lead and the switch to the appliance is placed in that lead, guaranteeing that no voltage will reach the appliance when it is switched off.

Interruptions in circuit wiring are not only an inconvenience, but also present fire hazards. The Consumer Product Safety Commission estimates that 50 people die every year from accidental electrocutions involving residential wiring, panel boards, circuit breakers, and outlets. Another 40 electrocutions each year involve household appliances that are connected to the wiring of homes.

By making sure you have a thorough electrical inspection completed by a qualified Mister Sparky® of San Antonio electrician before buying, selling or remodeling a home, you can help ensure your home’s electrical system operates at the highest level of safety possible. Our trained technicians can provide whole house re-wiring and evaluation of your circuits to ensure the safe delivery of electrical current within your home.

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Jose Ruiz was prompt and professional. He installed a ceiling fan for me, and I was very happy with the result. I appreciated his attention to detail and pleasant demeanor. Will be scheduling for fuse-box upgrade with him soon.

- Huyen Nguyen

Recently had major work done, main electrical panel outside and changing/updating bedroom fluorescents to led. Wow a lot but thankfully I had Joseph to help me thru it. He explained the entire situation to me, presented several options to me and answered all my questions. Hope I do not need electrical often but when I do Mr sparky getting my call. Exceptional service and the price was right.

- dan goguen

Timothy Fernandez came out to our house to mount a TV above our fireplace. He was outstanding, explained the best solution. There was not an outlet above our fireplace. He wired an outlet and walked us through everything he did. Throughly explained the warranty. We will definitely recommend.

- Gene Kimball

I had an emergency issue that required me to call an electrician rather than someone I knew. So I decided to find an electric company online that I thought would come by after hours (about 6:30PM) and let me just say, thank you Lord for having me call Mr. Sparky first. From the moment I got Autumn on the phone to having Stephen Uresti come out to the chaos I was dealing with, my experience was nothing short of amazing. I lost half the power going to my house not realizing the extent of how bad the situation was and Stephen made me feel at ease with getting everything fixed. I had to replace my main panel box outside as well as my inside panel box which was all an absolute disaster. Stephen was very communicative with me and helped me navigate my way through such a terrifying time and needless to say a huge financial decision. (Which was 100000% worth it) Not only did I receive excellent customer service from him but the meticulous work him and the guys did was 5 star. Stephen made sure my house was safe in the end and I can’t forget Robert Stewart and Tommy who did such an amazing job getting my panel boxes in and the beautiful workmanship they performed. Mr. Sparky, Stephen and crew, has not only saved my family and home, but restored my faith in humanity that there really are companies that care about people not just their pocket books. I’m proud to say I had work done by Mr. Sparky and will always call them first and recommend to anyone needing electrical work done in and on their home. What a fantastic crew I received who took care of me in such stressful traumatic time. 10/10 would recommend.

- Autumn Henderson

Frank was able to come out the day after we called and installed a GFCI outlet right where we needed it in our master toilet with no disturbance to the wider drywall. He also rerouted two wires that were a major tripping hazard up in our attic. Great service, would use again and recommend!

- Eric Hinrichsen

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