Cottage supplied by 16mm SWA 300+ yards! Trying to resolve a high Ze reading

[marconi]

Now

Hi, while carrying out an EICR at a farm cottage on Friday i came up against a problem early on. Whilst measuring the Ze the reading i obtained was 0.97 Ohms and 27Amps Pfc.
CH]

Assuming Uo of 230V then calculated PFC is Uo/Ze = 230/0.97 = 237A not 27A, a factor 10 different. Is 27A a typo and you meant to write 237A?

 

[marconi]

The two supplies are also sharing the same neutral .

For a split phase or two of three phase supply the neutral never carries a residual current of more than that of the highest line's current.

Is the remark you made directed at the fact that the shared neutral conductor in the cable to the cottages is fed by two switched neutrals?

 

[ukiri]

If the shared neutral is lost ,won`t you be getting 400v across both cottages? 2 phase US style but double the Voltage.