Learn more about SPDs at: www.NEMAsurge.org and https://www.esfi.org/p/surge-protection-devices
The 2020 National Electrical Code now requires Surge Protective Devices in new or renovated homes. Learn how these devices protect your home and your electronics.
What is a Surge?
A power surge is a brief overvoltage event that can damage electrical devices and is a common cause for failure of electrical equipment. Surges can damage and reduce the lifespan of:
Heating and Air Conditioning Systems
Washers and Dryers
Water Heaters
Rangers & Refrigerators
Lighting
Entertainment Systems
According to the National Electrical Manufacturers Association, the average home has $15,000 worth of equipment that can be damaged by surge.
Common Causes of Surge:
It is estimated that 80% of surges are caused by internal sources
Internal Sources:
Large appliances turning on / off
Faulty wiring or loose connections
Overloaded circuits, short circuits, or ground faults
Power recovery
External Sources:
Lightning
Damage to power lines
Utility power grid switching
NEW 2020 National Electrical Code Requirements
All new and renovated homes are required to be protected by Listed and Approved Type 1 or Type 2 Surge Protective Devices.
Type 1:
Permanently connected Surge Protective Device. Protects against external and internal surges. May be installed inside or outside the home.
Type 2:
Permanently connected Surge Protective Device installed in, or next to, breaker box. Protects again internal or external surges.
Type 3:
Extra protection. Point-of-use Surge Protective Device. Must be used in conjunction with Type 1 or Type 2 SPD to meet 2020 code requirements.
Use Type 1, 2, and 3 SPDs for the best level of protection.
