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Do you mean 1.0mm twin and earth cable ? Or are we talking single insulated single core cable?

You will have to change your existing light switch box to a 2 gang box if you want a 2gang 400w dimmer switch. Mk do a chrome type 450w/360va lv transformer controlling dimmer but you would have to check that your transformers are compatible with this . Look on the Mk website (decorative...

Is the space above the kitchen accessible with out lifting floor boards? How many lights are there? The transformer may be sighted at a light at the end of each row and used to control that particular row of lights. When you have removed the lights ,what do you find attached? ie heat proof...

When i have had to wire these,i use a switch fused outlet out side the bathroom to control a flex outlet plate that i position under the bath to connect into. I either use a rcd switch fuse for this or wire the switch fuse via the ring main which either i have protected with a rcd or rccbo...

Do you have any more lights on the same switch? If so check how this one is connected. What cables do you have at the swicht that contrals this light?

More information required What do you want to run in garage,ie tumble dryer,lighting etc? Distance from house cu ? What is your supply (look in the reference section at top of page)?

He has split load cu. _________________ Moderator edited to correct quote

Some times the fuses are tight and stick fast. This is if they are of the rewirable variety. Lighting fuse is generally the one that has 2 white dots on it,marked 5amp Have you lost power to your sockets as well as the lights? Sockets are protected by a 30amp fuse this has 2 red dots on it...

Are your rcd circuit neutrals connected to the rcd protected neutral bar?

Was the isolator switch installed at the same time as the shower? If the shower was a replacement for a smaller one (say 7.5kw) ,it could be that your isolator switch is not the correct size and there fore not designed to take the current, that your 10.5kw shower would draw. ie in the region...

What is the fuse/mcb size ie 40 amp,50? Is it protected with an RCD? What blows? What smells,trip, the isolater switch or the shower unit it's self? Is the cable the same as electric cooker cable(if you have one),or bigger? What is the distance from fuse board to the shower? More...

The value of ze is a requirement on a certificate,(Nature of supply). It is also needed with respect to zs=ze+(r1+r2) zs is mormally lower because of parallel earth paths if it is very high it could mean the bonding of the installation is not up to scratch. However this could be obtained...

Earth on a socket is the middle top . With the socket released from the wall/back box ,the earth terminal on the back is the one that has the cable linking it to the back box,this cable could be bare copper or green ,green/yellow . If bare copper it needs to be covered with green/yellow...

Are the cables in your socket boxes inside metal conduit, can you see a brass nut that the cables pass through? The metal conduit is used a an earth on some systems.

Whats the make of fan and what/where is it's application?

Is there a switch with a fuse beside it above the worktop? Any sockets in the cupboards adjacent freezer? Some times the appliance has it's plug removed and is wired straight into the switch fuse.( not recommended as generally would invalidate any guarantee), Switch fuse would normally...

You could wire a 4.0mm radial ,this does depend on distance as to what your fuse/MCB, is, ie 20 or 30 amp From spare way in cu, Run cable first to 30mamp RCD in a separate enclosure, then onto your sockets. Can you not make this circuit a ring main ?

Doe's this occur at specific times of the day or night ?

Take off dimmer ,make safe wiring , get in car go to mums ,trade dimmers ,see if problem still exists ie dimmer buzz on her lights if same. If it does replace dimmer sw,have long chat with sparks . :lol: :lol: If not check all switch connections are tight,earths are connecteds to switches...