Electric Shower Installation

The cable size depends on the shower’s kilowatt (kW) rating and the length of the cable run from the consumer unit. Most 8.5kW showers need a 6mm² twin-and-earth cable on a 40A MCB, while 9.5kW and 10.5kW showers typically require 10mm² cable on a 45A or 50A MCB. We calculate the exact requirements based on your property to ensure safe operation with no voltage drop issues.

Yes. An electric shower must have its own dedicated radial circuit running directly from the consumer unit. It cannot be connected to an existing ring main or shared with other appliances. The circuit must also be protected by a 30mA RCD to prevent electric shock, and a correctly rated MCB to protect against overload.

In most cases, yes. However, the installation must comply with BS 7671 bathroom zoning regulations. The shower unit itself must be suitable for the zone it’s installed in (typically Zone 1 or Zone 2), and the pull-cord isolator switch must be positioned outside the zones or be suitably IP rated. We’ll survey your bathroom to confirm the best and safest location.

A straightforward replacement on an existing circuit typically takes 2 to 3 hours. A new installation requiring a dedicated circuit from the consumer unit usually takes a full day, depending on the cable route and accessibility. We’ll give you an accurate timeframe after surveying your property.

Higher kW ratings deliver hotter water at a stronger flow rate. For most Manchester homes, a 9.5kW or 10.5kW shower offers the best balance of performance and practicality. However, your existing electrical supply and cable capacity may influence the maximum kW rating we can install. We’ll advise you on the best option during our free survey.