Extending a cable for electric shower

[600rob]

I need to extend the supply cable from my CU to my electric shower unit in order to move the unit.

Unfortunately i cant replace the cable as it runs from the garage , through some walls up into the loft then down the wall to the shower unit.

The joint would be in an accessible place in the loft.

Can anyone advise on what type/rated junction box ill need for this?

Cable is 2x6mm +2.5 earth. DP isolation switch fitted to control power to the unit

 

[Sureitsoff?]

my choice would be this, as you say its accessible in the loft

60A Junction Box

A strong and robust 60A junction box shaped for easier installation in tighter spaces. This oval enclosure has a depth of just 35mm - a slimline profile that's incredibly easy to work with.Inside, there's plenty of room and the three large brass terminals are easy to connect. The brown casing...

www.toolstation.com

 

[EFLImpudence]

...and this:

Crabtree Capital 50A 1-Way Pull Cord Switch White with Neon - Screwfix

Order online at Screwfix.com. 1-way DP with neon and mechanical indicator. Integral pattress for surface mounting. Can be mounted to a large circular conduit box. Terminals will accept up to 10mm² cable. Standard pull cord is 1.5m long, in white. For use with 25mm x 16mm trunking. Rated for...

www.screwfix.com

 

[600rob]

nice one thanks both