My father-in-law has asked me to install the electrics for his new shower. I have an electrical background (degree in electrical and electronic engineering) so I understand the theory, but welcome your advice.
On inspection of his setup the existing 7kW shower ran off a 30A separate consumer unit. His new shower (bought without getting any advice) is a 10.5kW Mira unit.
I have ordered him 10mm cable and a 63A 30mA RCD and a 50A MCB in a separate CU.
Firstly his main fuse is labelled 60A - will this be a problem - its a small 3 bed house - with a 30A ring and 2 5A lighting circuits?
When we gutted the bathroom and removed the shower I took out the old separate shower CU. I noticed that the earth block in the main CU was only connected to the shower CU by a thin (only 2.5mm or so) BLACK cable with another length joined to this trailing out of the fuse cupboard, cut where it left the cupboard- presumably from when their hall was decorated.
Potentially the whole house electrics has not been earthed since they decorated the hall!
In shock at this I have connected a 10mm earth cable in its place to a 10mm cable that is visible beneath the service connector block. Is this a legal way to connect the earth, or is there a connection I can make from the block itself? How should I connect this solder or cable clamp?
Thanks in advance of your advice.
Tony.
On inspection of his setup the existing 7kW shower ran off a 30A separate consumer unit. His new shower (bought without getting any advice) is a 10.5kW Mira unit.
I have ordered him 10mm cable and a 63A 30mA RCD and a 50A MCB in a separate CU.
Firstly his main fuse is labelled 60A - will this be a problem - its a small 3 bed house - with a 30A ring and 2 5A lighting circuits?
When we gutted the bathroom and removed the shower I took out the old separate shower CU. I noticed that the earth block in the main CU was only connected to the shower CU by a thin (only 2.5mm or so) BLACK cable with another length joined to this trailing out of the fuse cupboard, cut where it left the cupboard- presumably from when their hall was decorated.
Potentially the whole house electrics has not been earthed since they decorated the hall!
In shock at this I have connected a 10mm earth cable in its place to a 10mm cable that is visible beneath the service connector block. Is this a legal way to connect the earth, or is there a connection I can make from the block itself? How should I connect this solder or cable clamp?
Thanks in advance of your advice.
Tony.