#Chuffed - first downstairs ring done

[Desiderata]

Evening all,

Bursting with pride - yesterday managed to finish off and test my first from scratch ring final circuit, felt like a bloody test when it came to doing the testing but it passed with (almost) flying colours - only thing I had to change was a double socket front as it was a bit duff.

There, feel much better now - currently working on the upstairs radial socket circuit at the moment and looking good so far - getting faster at doing the basics which is a good sign!

Vinny

 

[Pete999]

Evening all,

Bursting with pride - yesterday managed to finish off and test my first from scratch ring final circuit, felt like a bloody test when it came to doing the testing but it passed with (almost) flying colours - only thing I had to change was a double socket front as it was a bit duff.

There, feel much better now - currently working on the upstairs radial socket circuit at the moment and looking good so far - getting faster at doing the basics which is a good sign!

Vinny

how did you test the RFC?

 

[telectrix]

with a scrum folloewd by a dropkick

 

[Desiderata]

how did you test the RFC?

Attached a plastic cup to each end of the Line conductor and tried talking to my mentor - if I couldn't hear him it meant there was a break in the conductor. Same for Neutral and the CPC
That was the first test

 

[telectrix]

with a sense of humour like that, you'll go farin the trade. like it.

 

[Pete999]

with a scrum folloewd by a dropkick

Three points then

 

[Pete999]

Attached a plastic cup to each end of the Line conductor and tried talking to my mentor - if I couldn't hear him it meant there was a break in the conductor. Same for Neutral and the CPC
That was the first test

With sarcastic replies like that you won't get much help from me.

 

[Desiderata]

With sarcastic replies like that you won't get much help from me.

Meant in complete jest Pete, very much light hearted and look forward to picking your brain, I'm not a young lad so anything said is always in good taste and I'm very much the sort of chap who'll be happy to say "I'm a mature learner who's wet behind the ears with electrics" so I'm willing to learn off anyone and everyone who has more experience than me (assuming of course they are doing things the right way!)

 

[Pete999]

Meant in complete jest Pete, very much light hearted and look forward to picking your brain, I'm not a young lad so anything said is always in good taste and I'm very much the sort of chap who'll be happy to say "I'm a mature learner who's wet behind the ears with electrics" so I'm willing to learn off anyone and everyone who has more experience than me (assuming of course they are doing things the right way!)

OK point taken, end of

 

[Desiderata]

how did you test the RFC?

First set of tests I did was to measure the end to end resistance of each conductor and the cpc, cpc reading was higher as anticipated using 2.5mm twin and earth with a 1.5mm cpc.
Second set of tests I connected the outbound line to the inbound neutral and the same for opposite legs to get my figure of 8. Took the MFT (not mine, I need to buy one myself) around and measured the resistance between Line and Neutral at each socket (making sure they were all switched on). Noted the highest reading from a spur.
Third set was the same as above but connected Line and CPC.
Then did the insulation test and passed pretty much with flying colours.

The whole property is being rewired so I haven't done any other tests as yet, normally I sit down with the spark I'm helping out and we talk through the tests as he does them .

Vinny

 

[The Ghost]

Did you estimate your expected end to end result before you did the test? Then do the maths on /4 etc. And did the tests bear out the pre-estimate of them? With the maths for x1.67 etc? I am asking purely as a matter of interest btw.

 

[Desiderata]

Did you estimate your expected end to end result before you did the test? Then do the maths on /4 etc. And did the tests bear out the pre-estimate of them? With the maths for x1.67 etc? I am asking purely as a matter of interest btw.

Evening Vortigern,

If by end to end you mean expected resistance over a length of cable I didn't only because there was an awful lot of cable used but I did do the math on /4 and the 1.67 and my results to be fair weren't far out at all (I had the spark sat with me as I did everything) - a couple of readings at sockets seemed a little out but after turning the switches on and off a few times they came within expected range.

 

[The Ghost]

Ok well that seems to be a job well done. I would say that if you put in the ring cct you must know how much cable you used and should calculate expected results. Even an estimate of cable used would do. Even if it is a bit of a bother. It just means there is one bit of those calcs you are not really sure of which is not ideal. Of course you can reverse the results calc on end to end and judge the length from that and see if that seems right. Unless it some great mansion I don't imagine you used more than 50 metres for upstairs so 50 x 7.41 / 1000 0.37? If your result was .37(.4) . .37*1000/7.41=49.9 ie 50m I think just to say there are other ways to skin a cat.

 

[Dave OCD]

Attached a plastic cup to each end of the Line conductor and tried talking to my mentor - if I couldn't hear him it meant there was a break in the conductor. Same for Neutral and the CPC
That was the first test

As long as you shouted a bit louder with the CPC to overcome the increased resistance.

 

[The Ghost]

Evening Vortigern