r1 + r2 testing

[SimpleSimon]

So how would you word 'test method 1' when testing for CPC? Without the book in front of me I thought it was worded r1 + r2. Which uses a temp link between live and earth at the board. And testing using a low resistance ohmeter to get a continuity result.

 

[cyberpunk]

this is from a guy on here who knows what he is talking about i suggest you go back to college or do some revision

If you are R1+R2 testing on a radial circuit then you simply isolate all power at the DB i.e main switch off, place a link between Line and Earth of the circuit you want to test, then go to the end of that circuit and measure the continuity between Line and Earth.

For a ring main again isolate, joint Line 1 to Earth 2, Line 2 to Earth one and measure at each socket on that ring circuit, the highest reading you get being recorded as the R1+R2 for that ring circuit.

 

[Sintra]

Not being funny guys but it is down to the terminology again r1 and R1, two entirely different meanings.

 

[SimpleSimon]

Oh hang on. Are we getting our capital letters confused? Is that the reason? R1+R2 or r1+r2

 

[rapier]

Yeah its all down to capital letters thought it would be straight forward sorry guys as i mentioned it was a lighting circuit so thought you would know yes (R1 + R2) temp link in board or join together in a connector my personal prefrence.

 

[rapier]

So looking at my post now does it make sense ???

 

[morph]

osg only uses r1 +r2 and then R1 + R2 on the ring test to stop confussion
all circuits with a line conductor and cpc can and should be tested for the R1 and R2 value ,

 

[Ponty Massive]

other way around

 

[SimpleSimon]

Seems like alot of noise over very little.

 

[lloyd1980]

R 1 + R 2 = line and CPC on any cct

r 1 , r 2 , r n = end to end continuity on ring final ccts

its all in 7671/ guidance note 3 or the OSG

when you look at this section on testing does anyone else feel we are underpaid for the amount of knowledge we have
sparks are by far the best trade - HOORAH

 

[lloyd1980]

Seems like alot of noise over very little.

couldnt agree more

(handbags )

 

[rapier]

Dont worry yourselves ive sorted the problem thanks for all the help , it appered to be a faulty length of wire, managed to rip it out and put a new piece in without to much damage as i pulled it in the capping it was just getting around the corners.
The cable seemed to have a bulge in it when i pulled it out, so spliced it and the line seemed to have a a little blemish in it which was touching the cpc with no obvious sign of penertration damage, so must of been faulty cable.

 

[Deleted member 9648]

Not some of that imported junk was it?....quality cable almost never has problems like that....impact damage from a hammer etc can cause the cpc to penetrate a core with no obvious damage to the sheath.

 

[rapier]

I dont think so wirepuller the cable had the basec approved mark on it, so it may have been from tool damage or crap cable?

 

[ezzzekiel]

Seems like alot of noise over very little.

got to disagree on that one Si, incorrect terminolgy may not seem that important but in my opinion the guys are right, if you start mixing things up then where does the confusion end?

does a main bond become a main earth or an ohm an amp

the replys were not directed at the op asking the question but to the incorrect answers he was given, if he is learning then its best to learn the correct way from the start.