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Whole-Home Surge Protection · Kentucky
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.
Older homes in Louisville and Lexington, plus spring storms and flooding, account for most repair calls.
Across the Southeast, homes deal with heat, humidity, frequent thunderstorms and hurricane season near the coast. 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 Kentucky cities where we have written specific notes.
Louisville's spring and summer storms bring frequent lightning, and the March 2023 windstorm caused one of the largest outages in LG&E's history, followed by surges when power returned. Surges commonly damage HVAC boards, appliances and electronics.
Utility: LG&E
Central Kentucky's spring and summer thunderstorms bring frequent lightning to Lexington, and surges commonly damage heat pump controls, furnace boards and electronics. Horse farms and rural homes on the edge of the city may have long overhead runs that are more exposed.
Utility: Kentucky Utilities (KU)
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: Louisville: Louisville and Jefferson County share a merged government, and electrical permits come from Louisville Metro's Office of Construction Review; Jeffersontown runs its own building department. Lexington: Lexington and Fayette County share a merged urban county government, and electrical permits come from its Division of Building Inspection.
Louisville: LG&E. Lexington: Kentucky Utilities (KU).
No. It handles large surges at the panel; point-of-use protectors handle smaller ones near sensitive electronics.
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