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Let me have a go at this one, although I’m a little confused by the 12kW load and specified with a load current of 40A, since as U0=230V, I would have thought Ib would be 52A, not 40A ? Using Ib=40A (Table 4D2B) 10mm2 Two core single phase AC voltage drop = 4.4mV/A/m Voltage Drop =...

As the OP seems to have disappeared from this thread, I'll give it a go, as am new to RFCs & still learning (I do temporary power, where it's all radials)... OSG Table I1 shows (R1+R2) for 4mm2+1.5mm2 CPC as 16.71mΩ/metre (58*16.71)/1000 = 0.97Ω 97/4 = 0.24Ω I'd say the multiple choice...

Without knowing the full scope of the job, the quote does seem rather high, however may be unavoidable, depending on the maintenance agreement in place on the lift.   It is highly likely that such a contract will preclude work being carried out by parties other than the lift supplier or their...

In the meantime, leave the whole area, walls included, well alone.   The DNO will treat this as an emergency as it is potentially dangerous since the supply side may still be energised.

Hi all, I'm Tony, some of you may recognise me as I have come here after leaving elsewhere... and I've seen some familiar names here already. My main area and experience is temporary event power distribution (7909 stuff) but I've been learning some of the more traditional disciplines over the...