Surge Protection Devices (SPD)
Surge protection devices (SPDs) are designed to protect your electrical system and appliances from sudden increases in voltage, known as power surges.
This guide explains how surge protection works and why it’s important for protecting modern homes.
Surge Protection Advice
Electrical surges can damage appliances, electronics, and even your home’s wiring. A surge protection device (SPD) helps safeguard your property by diverting excess voltage safely to the ground.
What is a Surge?
A surge is a sudden spike in electrical voltage. Common causes include:
• Lightning strikes nearby
• Power grid switching
• Switching from nearby industrial units
• Faulty appliances or wiring
Even brief surges can harm sensitive electronics like computers, TVs, LED lighting, and smart home devices.
What is a Surge Protection Device (SPD)?
A surge protection device (SPD) helps keep your home and appliances safe from voltage spikes:
• Installed in your consumer unit or at key points in your electrical system
• Diverts any voltage spike of around 270V and above safely to the ground
• Protects appliances and wiring from damage caused by spikes in electricity
• Modern SPDs have built-in protection so don't require an MCB or RCBO to protect them
Types of Surge Protection
• Type 1: Installed at the origin of the electrical supply (main incoming supply), typically in homes with overhead power supply cables feeding the property, or buildings with lightning protection installed
• Type 2: Installed in consumer units to protect circuits and appliances inside your home. Most domestic installations use Type 2 SPDs
• Type 3: Installed close to sensitive devices (like TV or computer) for final stage protection; often incorporated into extension leads or plug-in devices
Why You Need Surge Protection
Surge protection helps safeguard your home and electronics in several ways:
• Protect expensive electronics: Computers, smart TVs, kitchen appliances, and home entertainment systems
• Prevent wiring damage: Surges can overheat or degrade cables over time
• Peace of mind: Reduces the risk of insurance claims or appliance replacement due to electrical spikes
Tips for Homeowners
• Surge protection should be included when installing or upgrading your consumer unit
• Combine with RCDs and RCBOs for complete electrical safety
• Hire a qualified, Part P registered electrician for installation
• Check that your surge protection device is rated for domestic or commercial use depending on your needs
Why Choose RW Currion Surge Protection Installation?
• Fully qualified and insured
• Clear explanations — no jargon
• Work completed to the latest BS 7671 standards
• Safety-first approach to protect your home, family, and electronics
• All installations come with full certification and are emailed for your records.
Honest advice on any surge protection work required
Call now: 01295 533378
Mobile: 07740 100378