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Showers should be RCD protected (along with pretty much everything else mind you) but whether you can add an RCD/RCBO safely depends on your installation and will require testing to ensure that it is effective at doing what it is meant to. Could you provide a picture of your meter, service...

Thank god for combat trousers and their bottomless pockets :D

Strangely enough, I too received a despatch notification from Amazon :D Paul, it was £16.15 for me, I applied for the free 1month amazon prime offer which gives free next day delivery on all applicable orders, even without it would have only been £18.90.

Same here. :roll:

I like MK - I've heard comments about them not being as good as they used to be but I haven't had any problems with them.

I'd never use insulation tape to cover a connector strip in a permanent installation because its a horrible way of providing additional insulation. The individual conductors are suitably insulated from each other by the terminal block (assuming the electrician did a good job when terminating...

Regardless of whether the shower is too powerful for the circuit, that will not be the reason the RCD is tripping. The RCD detects an inbalance between phase and neutral which means that some of the current flowing through the phase or neutral conductors are going via the earth conductor...

... and the conditions the cable will be run in - i.e clipped direct, inside conduit/trunking, through the loft covered in insulation etc.

[/url] :roll: I thought I'd seen one somewhere but I must have missed it when I looked at TLC :oops:

And hopefully Rob has effective dust extraction 8)

I'm not sure if they make what you require, and if they do I'm sure someone will be along shortly to point you to a supplier but if you are fitting grid switches then an easy off-the-shelf option is to use a 3A FCU and a one-way switch. The FCU provides the 'always-off' option and provides...

I currently use a Trend T30AF. I like it because its quiet, has a long hose, and it filters down to 0.5microns for the very fine dusts. As happy as I am with it, I do find that when connected to powertools it lacks in the airflow department (as do all other standard vacuum cleaners) which is...

You can unlock orange phones but they charge you for the privilege - was about £20 a year or two ago and it took them ages despite telling me it would only take a few days. I think you'll have to get your son to phone them up though as I don't think you will be able to do it yourself -...

C - 1 Meg ohms

You take your voltage drop figure which can be found in table 4D4B (page 281) and multiply that by the expected current draw and multiply that by the length of the circuit. VD figures for SWA: 1.5mm² - 29 mV/A/m 2.5mm² - 18 mV/A/m 4.0mm² - 11 mV/A/m 6.0mm² - 7.3 mV/A/m 10 mm² - 4.4...

50metres is a long run for 2.5mm²... 18mv x 20A x 50m = 18v Maximum allowable VD is 5% or 11.5V - so you'll need to go up to 4mm² atleast.

Yes, every final circuit requires its own method of isolation. As per the regs:

Are you absolutely positive that the only connection is to the water pipe? There should be a connection to water/gas/oil pipes and then you should have another conductor going to an earth rod. If you are sure that the only connection from your main earthing terminal is to your water pipe then...

As linked to above, the approximate outer dimensions of twin and earth cables are listed in the wiki, the problem is that insulation thickness varies between manufacturers so if the size of your cable comes somewhere between 6mm² and 10mm² you will either need to assume it is 6mm² or measure the...

Then extend the cables, fill in the recess and put a surface mounted box in its place.