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Yes—unplugging sensitive or valuable electronics before a storm approaches can reduce their exposure to lightning-related surges. Do it well before thunder is audible. Once a thunderstorm is underway, do not handle plugs, cords, or electrical equipment to disconnect anything; the National Weather Service warns that doing so can put you at risk of being struck.
Why lightning can affect electronics indoors
Lightning can enter a building through electrical and phone lines, plumbing, and radio or television reception systems. Electronics connected to those systems can be exposed to lightning-related electrical surges, so disconnecting selected devices ahead of a storm is a reasonable precaution. It is not a guarantee against damage.
The National Weather Service’s indoor lightning safety guidance explains how lightning can enter a structure and cautions against unplugging equipment during a thunderstorm.
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When to unplug—and when to stop
Before the storm threatens
If a storm is forecast and you choose to disconnect electronics, do so while conditions are still safe and well before the storm approaches. The National Weather Service’s Spokane office advises, where possible, unplugging appliances and electronic equipment from all conductors well before a thunderstorm threatens. That can include connections beyond the AC power cord, such as reception-system connections.
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Use judgment: the point is to prepare early, not to make a last-minute circuit of the home touching wires as lightning draws near. See the Spokane NWS lightning guidance for its timing advice.
When thunder is audible or the storm is underway
Leave plugs, cords, and electrical equipment alone. The NWS says, “Do not unplug equipment during a thunderstorm as there is a risk you could be struck.” Avoid trying to protect a device at the cost of your personal safety; follow official lightning-safety guidance and wait until the storm has passed before handling equipment.
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What surge protectors can—and cannot—do
A point-of-use surge protector can protect connected equipment against most electrical surges, according to the Electrical Safety Foundation International (ESFI). It does not make equipment lightning-proof: the NWS and ESFI both caution that typical surge protectors cannot guarantee protection against a lightning strike. ESFI also notes that a point-of-use protector may need replacement over time or after a major surge.
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How the two surge-protection options differ
| Option | Coverage | Installation | Limit |
|---|---|---|---|
| Point-of-use surge protector | Equipment connected to the protector | Plug-in device | Protects against most electrical surges; does not guarantee protection from a lightning strike |
| Panel-mounted SPD | Electrical service entrance; a whole-home layer | Qualified electrician | Not a guarantee against lightning damage and not a reason to handle equipment during a storm |
These are different layers, not interchangeable promises of lightning protection. ESFI’s surge-protective device guidance covers their roles and installation. The guidance cited here does not establish a brand, model, rating, price, or performance comparison.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.A practical decision rule
- If you know a storm is coming and conditions are still safe, consider disconnecting sensitive or valuable electronics early.
- If thunder is audible or the storm has begun, do not unplug devices or handle cords.
- Do not treat a surge protector—plug-in or panel-mounted—as a guarantee against lightning damage.
This guidance comes from U.S. organizations; electrical systems and local safety recommendations may differ elsewhere.
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