Whole House Surge Protector Installation in Silver Spring, MD

Protecting the whole house from voltage surges

A surge is a brief spike in voltage, far above the 120 volts your devices expect. Most come from the utility grid when large loads switch on and off or when a storm hits lines, and some come from inside the house when a motor such as a compressor starts. A big surge can destroy electronics in an instant, and smaller ones wear them out over time.

A plug-in surge strip protects one set of devices at one outlet, and only as well as its internal parts remain healthy. A whole-house surge protector, installed at or beside the electrical panel, protects every circuit in the house, including the appliances that are hard-wired and the ones you do not think to put on a strip: the refrigerator, the furnace controls, the washer. It does not replace point-of-use strips for sensitive equipment, but it removes the big hits before they travel through the house.

Silver Spring’s summers bring frequent thunderstorms, and a house full of electronics, smart devices and variable-speed motors is more exposed than a house from a few decades ago. Recent editions of the National Electrical Code require surge protection on the service for new homes, and existing ones can add it. We select a unit that fits your panel, install it in a dedicated breaker space, and confirm the indicator shows it working.

Reasons to add whole-house surge protection

• Electronics that fail after storms. A router, TV or garage-door opener that dies after a thunderstorm is a classic surge casualty.
• Appliances with electronic controls. Modern refrigerators, washers and HVAC systems have circuit boards that are expensive to replace.
• Lots of home office or smart-home equipment. More devices means more to lose, and more reasons to protect the circuits that feed them.
• Frequent brief power flickers. Utility switching and storm events often show up as blinks before a surge or outage.
• Planning an EV charger or other big load. Higher-load additions are a good time to add protection at the panel.

How we install a whole-house surge protector

1. Check the panel and service

   We look at the panel brand, the available breaker space and the grounding, which determine what kind of unit fits.

2. Select a suitable unit

   We choose a surge protective device rated for your service, with an indicator that shows when it is working.

3. Install and connect

   The unit is wired to a dedicated breaker with short, direct leads, which matters for how well it clamps a surge.

4. Test and explain

   We confirm the indicator, label the breaker and explain how to tell when the unit needs replacing.

What affects the price of surge protection

The device itself varies in rating and cost, and the installation depends on your panel. These are the factors:

Why Zavala Electric for surge protection

The most important parts of a surge protector installation are the ones nobody sees: short wire runs, a solid ground and a proper breaker. We pay attention to them, and we tell you plainly what a surge protector can and cannot do.

It is not a cure-all, and we do not oversell it.

Where we do this work

We install whole-house surge protectors in homes across Silver Spring and its neighbors in Wheaton, Rockville, Bethesda and Washington, DC.