Surges can start inside or outside a home
A surge is a brief rise in voltage that can damage electronic equipment. Utility switching and nearby lightning are possible external sources; motors and appliances switching on or off can create internal surges. Computers are only part of the picture. Modern heating equipment, appliances, lighting controls, and other household systems may contain electronics worth discussing in a protection plan.
Match protection to the equipment
A permanently connected surge protective device can provide protection at the electrical system, while a point-of-use device adds protection near selected equipment. ESFI describes these as different layers. An electrician should select an appropriate listed device and installation for the actual service and equipment. Installation at a panel or service is professional work; homeowners should not remove covers to inspect or install a device.
- Which appliances and electronic systems does the proposal address?
- How will I recognize the device’s protection-status indication, and what should I do if that indication changes?
- What do the manufacturer’s instructions, warranty conditions, and replacement guidance require?
Set realistic expectations
Surge protection does not guarantee that equipment will survive every event. Eaton specifically cautions that its surge protective devices do not safeguard equipment against direct lightning strikes. Ask the installer to explain the proposed product’s limits. Also ask whether your project triggers surge-protection requirements and what permit or inspection applies.
Planning the work with Ai Builders Electric
Bring a list of the equipment you want to protect: appliances, office electronics, controls or other sensitive systems. We can discuss a coordinated electrical scope, the device location and how the owner will recognize when service or replacement is needed.
Common questions
Is every power strip a surge protector?
No. Check the product identification and instructions. Extra outlets alone do not establish surge-protection capability.
Will it keep the power on during an outage?
Surge protection and backup power serve different purposes. An outage plan requires an appropriate backup source and a compatible system design.
Official sources and further reading
- ESFI — Surge Protective Devices
- Eaton — What Is a Surge Protector?
- California Building Standards Commission — Codes
Sources checked October 27, 2026. Follow the operating instructions for your actual equipment.