Ring final circuit results.

[shocksl]

Hey guys as some of you will know I'm studying electrical installation at York college.

I've been trying to get some practice in with my MFT.

My results were for the ring circuit.
r1. 0.65
rn. 0.65
r2 1.06

Sockets. I was getting in the range of 0.31 ohms and 0.33. I had to open the sockets up to check with positive abd negative probe. I'm sure my tutor said I could use the plug that is supplied with my MFT 1720 tester. But that wouldn't do it. Kept getting great than 999 with that.. so hence why I opened it up.

r1 +rn /4 ..indicates the results may be ok?

However when I did the cpc and line check with the probes at the socket. I'm getting 0.71 ohms. Not sure if this is correct?

P.s I have the switches on position

 

[Pretty Mouth]

I'm sure my tutor said I could use the plug that is supplied with my MFT 1720 tester. But that wouldn't do it. Kept getting great than 999 with that.. so hence why I opened it up.

There's a problem there, either with your plug adaptor, or with your wiring. Have you confirmed that the plug adaptor is working correcty, i.e. have you tested for continuity between the leads of the plug adaptor and their corresponding pins?

 

[buzzlightyear]

Contnuty R1+R1. Same has neutral, same has cpcs.
R1+R2 contunuty.

 

[buzzlightyear]

Using the low reading ohm meter, test between Line and Earth on every outlet on the ring circuit. The highest reading is the (R1+R2) for the circuit. The readings at each of the sockets wired on the ring should be very similar and the value should be according to this formula: (r1 +r2)/4.