What is a Surge Protective Device (SPD) – and Why Your Home or Business Needs One!

So let’s break it down: What is an SPD, and why should you care?

What is a Surge Protective Device?

A Surge Protective Device, or SPD for short, is like a bouncer for your electrical system. It keeps unwanted voltage spikes from damaging your precious equipment and wiring.

Think of it this way: you wouldn't let a bull run loose through your front door – so why let a power surge rampage through your home or office? Whether it’s caused by a lightning strike, a grid switching event, or even large appliances turning on and off, a surge can send thousands of volts through your system in milliseconds.

An SPD kicks in instantly, diverting that excess voltage safely to earth – protecting your lights, sockets, consumer unit, and most importantly, your expensive electronics.

What Happens Without an SPD? 

Without an SPD, your electrical system is basically naked to the elements – and the risks are very real:

• Fried computers and TVs
• Destroyed smart appliances
• Melted wiring
• Electrical fires (yes, really!)
• Costly downtime for businesses

And unlike some electrical faults that give you warning signs, surges often strike silently and suddenly. You might not even know it’s happened until your devices stop working – or worse.

How We Install SPDs – the Keswick Electrical Way 

At Keswick Electrical Services Ltd, we take surge protection seriously – but we also believe in making things easy for you.

• Expert Installation: Our qualified electricians assess your property and install the right type of SPD – whether it's a Type 1 for lightning-prone areas, Type 2 for general protection, or Type 3 for sensitive equipment.
• Top-Quality Materials: We only use trusted, high-performance surge protection components that meet the latest regulations (BS 7671 Amendment 2, for the curious ones!).
• Tidy Work, Friendly Faces: We’re known across Bromley for our professional, friendly service and clean installations. No mess, no stress.
• Peace of Mind: Once your SPD is in place, you’ll know your home or business is protected 24/7. It’s a small investment for long-term protection.

Ready to Upgrade Your Electrical Safety? 

If you’re building a new property, updating your consumer unit, or just want to future-proof your home or business, a Surge Protective Device is a must. And with Keswick Electrical Services Ltd, you're in safe hands. 

📞 Give us a call or send us a message to book your SPD installation today – and protect your electrics the smart way!

Keswick Electrical Services Ltd – Powering your property, protecting your future.