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Surge Protection

A whole-house surge protector, also known as an SPD (Surge Protection Device), is an electrical apparatus installed at your main breaker box. It shields your home from power surges by redirecting excess electricity to the ground, thus safeguarding your appliances and electronics from potential damage.


SPDs are specifically engineered to protect your home from power surges, which commonly occur when electricity travels between devices within your home's circuitry, potentially harming appliances and electronics. These surges may stem from lightning strikes, voltage spikes in the power line, or even from household appliances and HVAC systems.

There are numerous scenarios where a whole-house surge protector proves invaluable. Residing in regions prone to severe weather like thunderstorms or hurricanes makes such a device crucial for shielding your home against power surge-induced damage. Additionally, if you own expensive electronics or appliances, a surge protector acts as a vital defense against sudden power surges that could potentially harm them. Ultimately, having a surge protector installed ensures readiness for any unforeseen events, making it a wise addition to your home.

When selecting a surge protector, it's essential to comprehend the available types to fulfill your home's electrical requirements. Here are the primary categories of whole-house surge protectors:

Type 1 — Panel-Mount Surge Protectors: These are installed between the power line and your home's service panel, safeguarding against external surges, including those caused by lightning strikes.

Type 2 — Point-of-Use Surge Protectors: Installed directly on your service panel, these devices offer protection against both internal and external surges. They are the most commonly installed type in residential settings.

Type 3 — Outlet Surge Protectors: These surge protectors are plugged into outlets to safeguard individual appliances. They are often utilized as a supplementary layer of protection.

When selecting a whole-house surge protector, consider these key factors:

  • Protection level required: Choose based on your electronics' sensitivity.

  • Voltage rating: Opt for higher ratings for better protection.

  • Response time: Look for a fast response time.

  • Clamping voltage: Select a protector with a low clamping voltage.

  • Joule rating: Higher ratings offer superior protection.


These five factors are paramount when selecting a whole-house surge protector. Remember them while shopping, and you'll undoubtedly discover the ideal protector for your home.

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