underground cable

[ibforman]

armour on underground cable is showing a very low volts.why is it showing any power

 

[plugwash]

what are you measuring relative to?

how many cores is the armoured cable?

are you using a core as earth?

is the armour properly tied to earth at the origin?

 

[ibforman]

I am using 3 core armoured cable with 1 core as earth The armour sheath is showing 1.5 volts before it is tied to the earth

 

[andy]

I am using 3 core armoured cable with 1 core as earth The armour sheath is showing 1.5 volts before it is tied to the earth

tie it to earth. makes sense.

 

[plugwash]

if its not tied to earth at either end then some float up would be expected

if its tied at one end and not the other then you may still se a volt or two if there is lots of current flow.