DIYbanter - View Single Post - Is RCD/RCBO mandatory for electric shower?

BruceB[_3_]

In article ,
says...

Is RCD/RCBO protection now mandatory?

Not because its a shower as such[1], although fitting one for a shower
is very common. However if the cable run is "unprotected" (i.e. cables
not enclosed in an earthed metal screen, and its buried in a wall at a
depth of less than 50mm), then it would need an RCD to comply with the
requirements for cable protection.

I believe that is wrong now.

If you replace the cable with a larger one then the work you have done
has to comply with the current regulations which require an rcd for
every circuit in a room with a bath or shower.