PIR done. high R1 on RFC. does this need a code?

[Grezza]

PIR done on domestic.
32a ring final circuit with RCD protection. R1 slightly high, most likely due to poor connection (0.92ohms)
R2 ( 0.54).

Does this need coding?

Zs is .53 so no non compliance there, but ob there is a clear fault on the R1.

 

[Nigel]

Further investigation. No code.

 

[westward10]

Poor connection, what do you think?

 

[Octopus]

FI = unsatisfactory

 

[Pete999]

PIR done on domestic.
32a ring final circuit with RCD protection. R1 slightly high, most likely due to poor connection (0.92ohms)
R2 ( 0.54).

Does this need coding?

Zs is .53 so no non compliance there, but ob there is a clear fault on the R1.

Those readings r1 and r2 will be the end to end resistance of the phase conductor and cpc I presume. Did you cross connect and do the R1+R2 tests,

 

[westward10]

OP what was the neutral reading end to end. It is possible the r2 is picking up a parallel path through a heating boiler for example.

 

[Ian1981]

A loose connection has the capacity for overheating and/or overloading so I would code it accordingly.
0.54/1.67=0.32 ohms for r1&rn assuming cpc‘s are 1.5mm2 in size.

 

[Highresdis]

Fails under observation item 5.17.1, as a C2. This is referred to in Best Practice Guide 4 page 14. The tolerance on continuity readings is 5%.
I've seen conductors fall out of the back of sockets when unscrewed, that can still give a reading similar to the one you've found.
It may be worth connecting each leg of the lives in turn at the board, and going round with the plug test lead to see if you can find the offending socket before removing the faceplates.

 

[gazdkw82]

Shouldn't you investigate? Not sure what is entailed within a PIR.

I higher resistance on the r1 compared to r2 would most likely be a loose connection. I had the same situation myself yesterday. r1 was so loose it fell out as I removed the socket.

Btw (little r1 and r2 refer to the end to end resistances respectively, but you know that?)

 

[Pete999]

Shouldn't you investigate? Not sure what is entailed within a PIR.

I higher resistance on the r1 compared to r2 would most likely be a loose connection. I had the same situation myself yesterday. r1 was so loose it fell out as I removed the socket.

Btw (little r1 and r2 refer to the end to end resistances respectively, but you know that?)

What type of cable is being used because if it's Twin and earth r2 will be a smaller size, hence a higher resistance than r1 or rn, wont it?

 

[gazdkw82]

Yes. 1.67 x higher.

In the original posts situation r1 is high compared to r2.

I still suspect a poor termination

 

[Pete999]

Yes. 1.67 x higher.

In the original posts situation r1 is high compared to r2.

I still suspect a poor termination

I hope you are right gazdkw but I think there is a more fundamental reason.

 

[gazdkw82]

I hope you are right gazdkw but I think there is a more fundamental reason.

Do you have a idea what is causing it?

 

[Pete999]

Do you have a idea what is causing it?

I asked the OP a question on Monday, a reasonable question I thought, so far no reply, so I guess he has sorted the problem, would be nice to know though.