Your Quick Guide to Electric Showers: kW Sizes and Safety First 🚿
Thinking about installing a new electric shower? Understanding its power rating and the correct electrical setup is key to a great shower and a safe home. It’s not just about a powerful stream; it’s about making sure your home’s wiring can handle the load.
An electric shower is a self-contained unit that heats cold mains water instantly with a powerful heating element. The shower’s kilowatt (kW) rating tells you how powerful that element is—the higher the kW, the faster and hotter it can heat the water, giving you a better shower experience.
The Link Between Power and Cable Size
This is the most critical part of your installation. A high-power shower draws a lot of electricity, and if the cable from your fuse box isn’t thick enough, it can overheat, melt, and become a serious fire risk. The size of the cable (measured in mm²) must match the shower’s kW rating.
Here’s a simple guide to what you need:
| Shower kW Rating | Required Cable Size (mm²) | Recommended Circuit Breaker |
| 7.5kW – 8.5kW | 6mm² | 32 Amp |
| 9.5kW – 10.5kW | 10mm² | 40 or 45 Amp |
| 11.5kW+ | 10mm² or 16mm² | 50 Amp |
Remember, this is a general guide. The length of the cable run from your fuse box to the shower can affect the required size. It’s always better to be safe than sorry.
Don’t Guess, Get a Pro!
Installing an electric shower is a job for a professional. It involves working with high voltage, and a mistake could be dangerous. For your peace of mind and safety, always hire a qualified and certified electrician or a trusted company like GMC Heating and Plumbing ltd.
We can help you choose the right shower and ensure it’s installed to the highest safety standards. For expert advice and a professional installation, contact us today at 07736937010.
