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Regards

Why would you assume a 37kW load? Since when has kVA ignored p.f? How on earth have you arrived at 53 amp per phase? Regards

Oh, whats the permited volt drop under fault conditions? :$

Just stick some prysmian afumex in .

So how do you connect a gennies protective earth say to a PME suply?

Disconnect what?

Kme If we have a three phase gennie how do we tie the voltage down? Where would we connect the protective earth, now draw out the path. Do you think a 500kva can be floating? Regards

Wozz, would need specific info, cable sizes, types of load etc, its difficult to advise without the full spec.

Wozz, The lighting Design is straight forward, just use the Manufacturers Tables and Guides, any queries just speak to their Tech. Dont group more than 5 circuits, post what circuits are within  the contatinment and we can see if we can help any.

Check your PM'S Wozz

Hi Wozz, you will need to show the drawing's for the entire system, when your ready we can go over the Thermal Constraint's using Adiabatic Lines :)

Hi Wozz ill PM you the Method i use for Domestic Supply's upto 100 amp, you could also use Attenuation tables too.

Wozz, which element of impedance would you expect to be the overriding factor in the dno's cable?

Okay:) 1, BS7671 only provides several regs regarding Ring Circuits, it doesn't provide the design. 2, The onsite Guide contains a design for a ring circuit, certain parameters need to-be met. 3, In what the op is describing, it differs from the IET design, so you need to be competent to...

Okay, I apologise. Though, you mention PD, Horse electrocuted, Faraday Cage, Bonding, hence why it's seems you are referring to touch voltage. I'm all ears Steptoe, I'm interested in what it is your designing to?

Sorry Binky, which Question?

LMFAO. What a load of rubbish!! If your point is designing to limit touch voltage your miles off. :)

:slap :slap Did you miss this part,"PME is a variant on TNC-S, its how the PEN is Constructed that Makes a TNC-S a TNC-S PME, what is it im confusing,please?" PME is not an Earthing System!!!! Reg 312.2 Types of Earthing Systems (and arrangementof Live conductors) , Have a read!! Pme is not...

Chris, your post #42, a correctly designed and installed PME system will not divert, i.e. export neutral fault currents outside the installation where the fault lies. Its simple, With a TNC-S you will get Diverted Neutral Current, now whether that is Diverted Current due ro a fault on the Pen...

Troll LMFAO Well your more than welcome to debate the points raised if you know better, the only contentious issue is that to which sidewinder was angleing too, that of PNB and the Neutral Bond Position which actually presents itself as TN-S, but thats another story. I will reply in the same...