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andrew, not always the case - check your osg. Some of their example test sheets have trcds but the box in question is not 'ticked'

On the schedule of inspections, under (c) Protection against indirect contact - When is the 'Presence of residual current device' box ticked? Also the 'Use of Class 11 equipment' - Does a double insulated emergency light fitting fall with this? thanks

Gents, What is required in a 'handover document' for a small commercial electrical installation? The installation consists of the usual circuits. Also included is a fire alarm and emergency lighting. I never heard of a handover doc before - only issued certs. - so any help is...

because i meant 'contactor' - 3 phase contactor thanks though

A 3 phase isolator is labelled as being 25A. Is this 25A per phase or a total of 25A over the 3 phases? cheers

Isolator or switched-fuse? Should there be an isolator of a switched fuse between the REC incomer and a cu? I have heard conflicting advice on this. In fact, it was suggested that nothing is needed in between. The run is approx 16 metres. thanks

thanks Salem talked to a housebuilding friend of mine. He tells me that a fan isnt required if the house has a type of air conditioning unit in it. This is the case with the house in question.

thats my point... this one wasnt

david, try asearch on this forum. I THINK someone had posted a link to help with such matters.

thanks d, the house is a new build - 1 year old. A power shower was installed but no fan. I thought this was because the room had an openable window... can anyone provide a definitive answer on this?

Does a bathroom containing a shower require a fan for ventilation? The bathroom has an openable window... thanks as always

so how can i tell the difference between the 2?

dw, havent actually purchased the cable. just wondering what to ask for/look for when buying. And is there a cost difference? Bought SWA before, but never really looked at it for markings like you suggest. thanks for the reply

How do you tell if armoured cables are 90 degrees c thermosetting or 70 degrees c thermoplastic? cheers

________________________ Moderator post removed. Please see item 9

good call

Does the exterior of a portacabin requiring earthing? Would it be considered an extraneous conductive part?

most informatives gents. And the higher the voltage, the more power then?

what is the meaning of the 1,4 Ah on the side of my 12v cordless drill? cheers

Talked to the NIC (after 5 min hold on an 0870 number) and they say that it is unlikely that supplementary bonding is required in this scenario. But to prove it with a test instrument to keep myself right - If the reading is over 22,000 ohms then its ok. Also to disregard water as a conductor.