which is the besst way?

[Taylortwocities]

Make that pantry light an emergency one. Then you have illum even if the RCD does trip.

Simples!

 

[ipf]

No.
You need to check the R1 and R2 on this spur, but this spur will be short, so will give untypically low figures for R1+R2. You need to record the highest R1+R2 for the circuit, which will be somewhere near the middle if it's a ring, or at the extreme end if a radial, or possibly at the end of a long spur off the ring.

If it's a complete ring, the R1+R2 should be the same throughout the circuit, surely.

 

[DaveyD]

highest R1+R2 for the circuit, which will be somewhere near the middle if it's a ring

?

If it's a complete ring, the R1+R2 should be the same throughout the circuit, surely.

Agree.

 

[HandySparks]

If it's a complete ring, the R1+R2 should be the same throughout the circuit, surely.

I think you're getting confused with r1 and r2.

 

[HandySparks]

?

If you measure R1 and R2 (or R1+R2) directly at various points on a ring, rather than by doing the figure of eight test, the maximum figure (which is the one to record) should be found at the socket outlet "furthest" from the origin, ie about half way round the ring.

 

[ipf]

If you measure R1 and R2 (or R1+R2) directly at various points on a ring, rather than by doing the figure of eight test, the maximum figure (which is the one to record) should be found at the socket outlet "furthest" from the origin, ie about half way round the ring.

R1+R2 is the result gained via the figure of eight test and should be equal at each point of the rfc.

 

[HandySparks]

R1+R2 is the result gained via the figure of eight test and should be equal at each point of the rfc.

Yes, I understand that, but are you saying that it is not permitted to measure it directly, like on a radial circuit? ie do you HAVE to use the figure of eight method?

 

[Taylortwocities]

Yes, I understand that, but are you saying that it is not permitted to measure it directly, like on a radial circuit? ie do you HAVE to use the figure of eight method?

If you want to get your R1+R2 figure then you can use the figure of 8 method
or you could add r1 to r2 and divide by 4.
The figure of 8 test (as detailed in the OSG) if the recommended method because you can check R1+R2 at each point and check polarity (also as detailed in the OSG).