You can't work out VD within the installation (which is what 'matters') from the L-N loop impedance(ore PSCC) - such a calculation will tell you the VD all the way from the supplier's transformer to wherever the measurement is made - which could be pretty high, particularly if one's property were at the end of the supplier's cable run.I agree therefore there are some areas where they could be improved, for example there is no provision for PSSC or line-neutral impedance needed to work out volt drop ...
If you subtract the loop impedance at incomer from that at a central socket you can work out the volt drop, however my point is it may be all well and good with first installation certificate, if this practice was then continued, so one could see if an undocumented addition has been made, but unless the installation certificate and all periodic inspection reports have this info recorded, then although you may have identified a potential over spec volt drop, you have no idea as to if planned or not.You can't work out VD within the installation (which is what 'matters') from the L-N loop impedance(ore PSCC) - such a calculation will tell you the VD all the way from the supplier's transformer to wherever the measurement is made - which could be pretty high, particularly if one's property were at the end of the supplier's cable run.
Kind Regards, John
What have you been using all these years for, or as a source of, editable EIC and MEIWC forms?Can anyone tell me where I can download editable EICR Forms please. PDF or Excel would be great
What have you been using all these years for, or as a source of, editable EIC and MEIWC forms?
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