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The best way to do it is determine what the maximum length of the cable is for your maximum Zs AND Voltage Drop. You can do this using these equations: Zs Z41 - Ze / (R"1 + R"2) * Cr where Z41 = Tabulated max Zs values from BS 7671 Ze = Measured external earth loop impedance R"1 + R"2 =...

Wouldn't he already have tested the one immediately before that one? :C

Cheers for that Paul.

Paul, I'm going to be registering with Elecsa in the next 2 or 3 months. I'm not too worried about the assessment, but not sure about Risk Assessment Procedure, Health & Safety Policy, Complaints etc. Also do you need 2 jobs for assessment or will 1 do. I am in the middle of wiring a new...

Who are you hiding them from? :C

I'd just wire it as if it was a class I fan with timed over run. Any wires you don't need at the fan can always be terminated in a connector block. This way (as has already been mentioned) if the customer wanted to change it in the future then all the wires are there ready to go. 3&E (Perm...

.....while also doing a load of washing with the last load in the dryer and making a cup of tea:put the kettle on:_|

Technically the FCU is outside the zones as it's more than 0.6m from the edge of the bath. Still bad practice mind.

Page 18 On-Site Guide. (for gas pipes, but the only thing I can find) Separation of at least 25mm to be provided for domestic pipework up to 35mm. For pipework over 35mm then 50mm separation is required. ...... To me that means normal central heating pipework (15mm or 22mm) is 25mm separation...

Unless he has it set on 300mA by mistake. The limit would then be 167ohms would it not. :C

Typed it out mate. bad day explode Wish I had them on file though....be much easier!!!!

I think he must have as I can't seem to find anything to support his requirements, and TBH I've never bothered looking until now (just done what he asked to keep him happy as he can be a bit of a TOOL if you question him). headbang Next time I see him I'll have BRB ready and ask him to point...

528.3 Proximity to non-electrical services (Page 109 BRB) 528.3.1 A wiring system shall not be installed in the vicinity of services which produce heat, smoke or fumes likely to be detrimental to the wiring, unless it is protected from harmful effects by shielding arranged so as not to affect...

The building control officer where I am demands that all cables are at least 50mm from heating and water pipes.

The box you have linked to is IP65 rated (protection against water jets). Wouldn't drilling a hole in the bottom compromise the IP rating???

Did a quick search on Google Shopping and found this: http://uk.ebid.net/for-sale/bs-5839-part-6-fire-alarm-standards-for-dwellings-26860938.htm?from=googlebase

Found this. https://squareup.com/features

We're not talking about the maximum demand the fuse can carry. We're talking about the maximum demand of an installation in normal service which will probably never come anywhere near to 100A.

Not after you've applied Diversity to all the circuits.

In Green