Ring test

[Cj24]

How do u do a test on your ring,

 

[Sintra]

The R1+R2 test sequence for ring final circuits
Step 1 Securely isolate the circuit and using a low ohms continuity test meter measure the resistance of the phase (r1), neutral (rn) and cpc (r2).
Step 2
i. cross connect the phase and neutral of the ring.
ii. measure the resistance between the pairs at the point where the cross-connection is made.
iii. the reading should be approx 1/2 that for either the p or n conductor in Step 1.
Step 3 With the p+n still cross connected measure between p+n at each point on the ring.
The reading should be approx the same as in Step 2.
Spurs will give a slightly higher reading.
Step 4 Repeat the procedure as in Steps 2+3, but using the phase and cpc conductors.
These readings should differ slightly at each point.
The highest value represents the R1+R2 value for the circuit.
This test sequence also verifies polarity and cpc continuity to all points in the ring unless the testing has been carried out at the terminals on the reverse of the accessories then a visual inspection is required to confirm polarity