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The uncle sparks would have a grade card issued by JIB that would prove his qualification if he had any sorry to change the subject

you can try your local elec wholesalers and buy a volt stick to rub over the cable

Your not suppose to but some do thats all I am saying

Still think its safer not to have two circuits in a switch in a domestic reg or no reg and best to have landing and downstairs passage on same circuit if usimg a two gang switch :lol:

It was always what we were taught we always had to put labels inside the switches whwn we come across them.Its pretty dangerous to have two circuits in same switch in a domestic I think

Well I must be used to the finer things in life in all fairness though I only said I aint used or seen them not they dont excist :lol:

It is normal that a downstairs passage light would be on the same circuit as the upstairs passage light to avoid two circuits being fed from two different fuses at the switch and therefore having a potential of 400 volts at the switch.

Sorry never used any smokes that were only battery opperated or seen any

The ones you have are they fed with a two core cable then a three core interlinking to the other one if they are then connect the others using a three core same connections.They need to be conected so if one goes off they all do Are the others just battery opperated?or mains too

Are you saying the old gas incomer[which is already bonded] is being removed/replaced or that new copper pipe work is being fitted to the one thats there and new pipiework is being taken around the building then back in to your boiler?

The regs peeps may have a few words to say about the guy who put it in there if it is :lol: :lol: I go with the coroded element theory

Have you fitted the light and is it working ok eg switching on/off

It would need another cable running to the switch and a bit of a rewire at the lights

did the old switch control two lights

I thought it was 10mm if the incoming neutral was less than 35mm and 16 was for over 35 and less than 50 :?:

You can use a single earth so long as there is no breaks in the cable I believe and 10mm is fine if your supply neutral is less than thirty five mm

That would need working out taking a few things in to consideration eg load[diversity]cable run/length etc really your spark should be able to work that one out using the regs on-site etc

Is there a meter cupboard on out site wall maybe there should be a suppliers fuse in there

Probably changed a bit but may help www.screwfix,com/talk/thread.jspa?threadID=33170 Someone on here will have more up to date advice

After starting all that arguing about 17th CUs and youve ran off and started another thread :lol: