Type-A RCDs vs Type-AC: The Upgrade That Could Save Your Appliances and Your Life

Have your lights ever flickered or your RCD tripped for no obvious reason? You might be relying on outdated protection.

Most UK homes still use Type-AC RCDs, but as our homes get smarter, these older devices are falling behind. That’s why Volt Electrical Solutions Ltd recommend Type-A RCDs as the safer, smarter choice for modern households.

Here’s what you need to know before your next electrical upgrade.

Outdated Devices, Real Risks

Type-AC RCDs only detect basic alternating current (AC) faults. But many of today’s appliances  from EV chargers to LED lights  can leak pulsating DC currents that AC devices completely miss (we call this blinding of the RCD).

That means your home could be exposed to electrical hazards without you even knowing, until it is too late.

Why Type-A RCDs Make Sense

We’ve tested and installed Type-A RCDs in residential homes across London, Essex and surrounding areas for over 6 years. They provide better fault detection, fewer nuisance trips, and better protection for expensive modern equipment.

Added Bonus: They’re fully aligned with the latest 18th Edition wiring regulations meaning you’re future-proofed for any upcoming safety checks or electrical installations.

Who Should Upgrade?

Ask yourself:

• Do you use modern appliances like EV chargers, induction hobs or laptops?

• Do your breakers trip randomly?

• Is your consumer unit older than 10 years?

If you answered “yes” to any of these, it’s time to consider a consumer unit upgrade with Type-A RCDs.

Final Take from Volt

At Volt Electrical Solutions Ltd, we’re seeing more faults caused by outdated RCDs — and more clients relieved when we swap them out. It’s a small change that makes a big impact on your home’s safety and performance.

Book an electrical system inspection today and ask about our RCD upgrade service. We’ll help you stay safe, compliant, and confident.