How does max volt drop for 25mm or 35mm feeds to sub CU work.
Do we for example allow only 1% drop on the 25/35mm so we can keep 2% drop for lighting circuits and 4% for power circuits, or is there any where else in the regs that gives specific figures on maximum allowed volt drop? Any difference for single phase or 3 phase supplies?
Thanks.
Do we for example allow only 1% drop on the 25/35mm so we can keep 2% drop for lighting circuits and 4% for power circuits, or is there any where else in the regs that gives specific figures on maximum allowed volt drop? Any difference for single phase or 3 phase supplies?
Thanks.