Whole-Home Surge Protection
One Power Surge Can Damage Everything. Protect your home's electronics, appliances, and smart systems with a whole-home surge protective device.
One Power Surge Can Damage Everything
Houston's electrical grid takes a beating. Thunderstorms, lightning strikes, utility switching events, and even your HVAC cycling on and off can send voltage spikes through your home's wiring. Most are small. Some are not. And when a significant surge hits, it does not just fry the device that is plugged in — it travels through every circuit in the house simultaneously.
Power strips with built-in surge suppressors offer limited protection at the point of use. They do not protect hardwired appliances like your HVAC system, your refrigerator, your water heater, or your in-wall smart home devices. Whole-home surge protection does.
LCF Electrical installs whole-home surge protective devices (SPDs) at the service panel across The Woodlands, Conroe, Spring, Tomball, Magnolia, Houston, Katy, Cypress, Humble, and surrounding areas. One installation. Every circuit in the house protected.
How Whole-Home Surge Protection Works
A whole-home SPD is installed at or immediately adjacent to your main electrical service panel. When a voltage surge enters the home — whether from a lightning strike nearby, a utility fault, or an internal source — the SPD detects the excess voltage and diverts it to ground before it can reach your appliances and electronics.
This protection happens in microseconds, faster than any individual surge strip can react.
The result is a first line of defense that protects everything in the home simultaneously. Point-of-use surge strips at individual outlets provide a useful second layer, but they cannot do their job alone.
What a Whole-Home SPD Protects
Individual electronics on surge-protected power strips get the benefit of both layers of protection.
HVAC Systems
Central HVAC systems and heat pumps
Major Appliances
Refrigerators, freezers, washer and dryer
Water Heaters
Electric water heaters and tankless units
Smart Home
Smart home systems, hubs, and security
Lighting
Hardwired lighting and lighting controls
EV Chargers
In-wall EV charger circuits
Home Office
Home office equipment on every circuit
Everything Else
Any appliance or device connected to your home's wiring
This is Now Required by Code in Texas
The 2023 National Electrical Code (NEC), adopted in Texas on September 1, 2023, requires that all residential services supplying dwelling units be provided with a surge protective device. This is codified under NEC Section 230.67.
Specifically, the code requires:
- The SPD must be a Type 1 or Type 2 device
- It must be installed as an integral part of the service equipment, or located immediately adjacent to it
- The SPD must have a nominal discharge current rating (In) of not less than 10kA per phase
In plain terms: if you are having any electrical work done at your panel — a panel upgrade, EV charger installation, generator integration, or any work that triggers a permit — the city inspector will expect to see a compliant SPD installed. If you do not already have one, it will be a required part of the work.
LCF Electrical includes SPD installation as a standard component of all panel upgrade projects. If you have had recent electrical work done without one, you may be out of compliance with the 2023 NEC.
Type 1 vs Type 2 SPDs
Type 1 SPDs
Type 1 SPDs are installed ahead of the main breaker, typically at the meter base. They are designed to handle direct lightning surges and are the most robust option. Not all panels and service configurations can accommodate a Type 1.
Type 2 SPDs
Type 2 SPDs are installed at the main panel, on the load side of the main breaker. This is the most common installation for residential homes and the standard we install in most cases. Type 2 devices meet the 2023 NEC requirement for dwelling units.
We will specify the correct type for your panel configuration when we provide the quote.
Frequently Asked Questions
I already have surge protector strips. Is that enough?
No. Point-of-use strips protect the devices plugged into them, but they do not protect hardwired appliances, they do not cover every circuit in the home, and they can be overwhelmed by significant surges. Whole-home protection and point-of-use strips work best together.
Does homeowner's insurance cover surge damage?
Many policies have exclusions or limits for surge-related damage. Some insurers offer discounts for homes with whole-home SPDs installed. Check your policy and speak with your agent. We can provide documentation of the installation.
How long does an SPD last?
Quality SPDs are rated in joules of surge absorption. Every surge they handle uses a portion of that capacity. Most Type 2 residential SPDs have indicator lights that show when the device has reached the end of its protective life and needs replacement. We install units with clear status indicators.
Does this require a permit?
SPD installation as part of a panel upgrade is covered under the panel permit. A standalone SPD installation on a permitted panel typically does not require a separate permit, but LCF Electrical will confirm this for your specific situation before starting any work.
Can you install one on my existing panel?
In most cases, yes. As long as your panel has the required space for the SPD and is in serviceable condition, we can add one without a full panel replacement.
Get a Fixed-Price Quote
No hourly estimates. No surprises. You will know the full cost before we start — that is our commitment on every job.
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The Woodlands, Conroe, Spring, Tomball, Magnolia, Montgomery, Houston & surrounding areas
