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Whole-Home Surge Protection · Texas
A whole-home surge protective device (SPD) mounts at the panel and limits voltage spikes before they reach your circuits. The current National Electrical Code requires one for new and replaced services in dwellings; it works best paired with plug-in protectors for electronics.
Heat, hail and the 2021 winter storm have made generators, surge protection and panel capacity priorities; electricians are licensed by the state through TDLR.
Across the South Central, homes deal with long, hot summers, severe storms and occasional hard freezes. Permit offices, utilities and housing stock differ by city, which affects how whole-home surge protection is planned and scheduled. These local guides cover the Texas cities where we have written specific notes.
The Gulf Coast gets frequent thunderstorms, and Houston homes run sensitive electronics, smart thermostats and variable-speed AC equipment that surges can damage. A whole-home surge protective device at the panel, backed by point-of-use protectors for electronics, is the common approach.
Utility: CenterPoint Energy (lines and meters); retail provider of your choice
North Texas spring storms bring hail and frequent lightning, and surges can damage AC equipment, pool controls, garage door openers and electronics. A whole-home surge protector installed at the panel is the usual first step, combined with plug-in protection for sensitive devices.
Utility: Oncor (lines and meters); retail provider of your choice
Spring and summer thunderstorms in South Texas bring frequent lightning, and surges regularly damage AC equipment, pool controls and electronics in San Antonio homes. A whole-home surge protective device at the panel, combined with plug-in protectors for sensitive devices, is the standard approach.
Utility: CPS Energy (city-owned)
Central Texas spring storms bring frequent lightning, and Austin homeowners often call after surges damage AC control boards, pool equipment or electronics. Homes with rooftop solar, batteries, EV chargers and smart appliances have more sensitive electronics to protect.
Utility: Austin Energy (city-owned)
Hail and lightning arrive together in Fort Worth's spring storms, and the calls that follow are often about fried AC control boards, pool automation, garage door openers and televisions. A whole-home surge protective device mounted at the panel handles surges coming in on the utility line, and plug-in protectors cover sensitive electronics.
Utility: Oncor (lines and meters); retail provider of your choice
El Paso's monsoon season, from about July through September, brings thunderstorms with lightning, wind and dust, and surges can damage refrigerated AC equipment, evaporative cooler controls, solar inverters and electronics. A whole-home surge protective device at the panel, combined with plug-in protectors for sensitive devices, is the standard approach.
Utility: El Paso Electric (not on the ERCOT grid; no retail choice)
Corpus Christi's summer thunderstorms and tropical systems bring lightning, and salt air corrodes the grounding connections that surge protection depends on, so the electrician should check the grounding electrode and meter base. Surges commonly damage AC control boards, pool equipment, boat lift motors and electronics.
Utility: AEP Texas (lines and meters); retail provider of your choice
Central Texas spring storms bring frequent lightning to Waco, and surges commonly damage AC control boards, furnace electronics, garage door openers and televisions. Renovated homes in Castle Heights and Sanger Heights often have new smart thermostats and appliances worth protecting.
Utility: Oncor (lines and meters); retail provider of your choice
East Texas spring and summer storms bring frequent lightning to Tyler, and surges commonly damage AC control boards, furnace electronics, well pump controllers in outlying areas and televisions. Homes under tall pines may also see surges when falling limbs strike lines.
Utility: Oncor (lines and meters); retail provider of your choice
1. Check grounding
Grounding electrode and bonding are inspected.
2. Install the SPD
The device is mounted on a breaker or lugs with short leads.
3. Verify
Indicator lights and connections are checked.
Electricians set their own prices; local permit fees and utility requirements add to these factors.
Permits come from the city or county where the home is. For example: Houston: Inside city limits, electrical permits come from the City of Houston's permitting center; unincorporated Harris County and suburban cities have their own rules. Dallas: Electrical permits in Dallas come from the city's Development Services department; suburbs such as Plano, Garland and Irving issue their own. San Antonio: Inside city limits, electrical permits come from the City of San Antonio Development Services Department; suburban cities issue their own. Austin: Electrical permits inside the city come from the City of Austin Development Services Department; surrounding cities and Travis County have their own processes. Fort Worth: Inside city limits, electrical permits come from the City of Fort Worth Development Services Department, and Fairmount and other historic districts review exterior changes. El Paso: Electrical permits inside city limits come from the City of El Paso's development services; unincorporated areas and nearby towns have their own process. Corpus Christi: Electrical permits inside city limits come from the City of Corpus Christi's development services. Waco: Electrical permits inside city limits come from the City of Waco's inspection services. Tyler: Electrical permits inside city limits come from the City of Tyler's building services; Smith County handles unincorporated areas.
Houston: CenterPoint Energy (lines and meters); retail provider of your choice. Dallas: Oncor (lines and meters); retail provider of your choice. San Antonio: CPS Energy (city-owned). Austin: Austin Energy (city-owned). Fort Worth: Oncor (lines and meters); retail provider of your choice. El Paso: El Paso Electric (not on the ERCOT grid; no retail choice). Corpus Christi: AEP Texas (lines and meters); retail provider of your choice. Waco: Oncor (lines and meters); retail provider of your choice. Tyler: Oncor (lines and meters); retail provider of your choice.
No. It handles large surges at the panel; point-of-use protectors handle smaller ones near sensitive electronics.
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