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#### stuartgil

Here i go:

A 10mm, Two core armoured 70 degree Pvc Insulated cable (copper conductors) is clipped direct to a surface and forms a two wire radial distributor loaded at three points. From the supply end at 230 volts, the first load is 10A and is at a distance of 50m, the second point is 7A and is a further 30m and the third is a 5A and is 40m away from the second load point.

* Find the current in each section

* Calculate the overall voltage drop using IET Wiring regs.

So i have, first section (10A @ 50M)

Current lb= 230/10 = 23A

From the IET Wiring Regs i have found the mV/A/m value of 4.4

calculation of voltage drop = 4.4x23x50/1000 = 5.06 volts.

Please can one of you more experienced electricians see if i'm on the right track? Would really appreciate your help, thanks stuart.