Help IR Testing on a ring final circuit

[olsonn]

I am trying to do some individual circuit testing ahead of my 2391 practical, but I am having a problem with final ring circuits. Radial circuits aren't a problem, but when you look in all the guidance including GN3 it only deals with lighting circuits. Do you have to join all 4 live ends together? I am obviously doing something wrong as the 3 step continuity of ring final circuits is, spot on as is the R1+R2, but I am getting 0.00 for IR.

 

[the pict]

Or the meters on Cont getting a open circuit response

 

[Zorro]

Don't forget precautions and preconditions before Insulation Resistance testing.