9.5KW ELECTRIC SHOWER CABLE SIZE

Wiring an Electric Shower - Electric and Power Sower Installation

Safety is paramount when dealing with any form of DIY, but never more so than when dealing with electricity. If you are unsure about anything, or not confident you can complete the job safely, always consult a Professional Electrician, to not do so could be risking your life and that of your family. Regulations now insist that all domestic DIY electrical work is checked by a qualified electrician and a minor works certificate issued. Failure to do this could render your house insurance invalid and make selling your home very difficult.
All the advice contained here is in accordance with BS7671: 2002 The IEE Wiring Regulations, and if followed will ensure a safe installation that will last many years.

Before you even decide you want an electric shower, you should check your consumer unit (fuse box) and the size of the supply coming in to your property.
Large showers use a lot of power (load), and this can cause issues on older installations that may have consumer units that are not capable of handling this extra load.
As a rule of thumb, if you have a 60A or 63A main switch, then your supply fuse will likely be 40A or 60A, if it is 80A or 100A the supply fuse will likely be 60A, 80A or 100A, quite often a phone call to your supply company can resolve this.
NEVER break the seal on your incoming fuse holder to look at the fuse, this is illegal and could lead to prosecution.
For a great range of showers, shower enclosures, shower accessories, shower trays and shower pumps, together will all manner of bathroom fittings, click on the images at bottom.

Common Shower Ratings and Protective Devices

Table 1 below gives figures for Common shower ratings and the Protective device and cable required to install them safely.
Standard Shower Rating Watts (kW)