R1 & R2 Testing Help

[steve100]

Just started testing at college and not sure of the following in regards to the R1 + R2 testing:

1. Why are the readings in a ring the same or similar? Compared to radial?

2. Why do you cross connect line and cpc in a ring to carry out the R1 + R2?

Thanks
Steve

 

[Phil]

have a look [video=youtube;9GRLM6sgDXM]http://www.youtube.com/watch?v=9GRLM6sgDXM&feature=related[/video] mate. i could explain it to you but its sometimes easier to get a visual on things rather than reading it. if you need any more help let me know and i will explain it to you

 

[Johno]

So that's what you look like phil!

 

[Phil]

So that's what you look like phil!

cheeky begger i get stressed by the kids but they have not aged me that much (sorry chris if your reading )

 

[steve100]

Thanks for the reply, please bear with me, I have done some testing but still not sure as to why the R1 + R2 readings on a ring are similar/same at each socket? But on a radial they are different?

Do you cross connect the line and cpc to ensure a complete ring when testing R1 & R2?

 

[Jimmy Boy]

At college they call it the "Figure of eight" method if I remember correctly.

Resistance is proportional to length and inversely proportional to CSA (Cross sectional area) so a Radial increases in R, by making it a ring you are effectively doubling the CSA ( I think) but my brain hurts lol

 

[Jimmy Boy]

Buy Guidance note 3 mate as well

 

[Phil]

Thanks for the reply, please bear with me, I have done some testing but still not sure as to why the R1 + R2 readings on a ring are similar/same at each socket? But on a radial they are different?

Do you cross connect the line and cpc to ensure a complete ring when testing R1 & R2?

you have a pm should explain things a bit. let me know if you are still unsure

 

[Fred West]

Anybody in need of one of these? They are on Ebay at the moment for just over a Tenner.

Please wait
Image not available

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Kewtech Kewcheck R2 Socket Adaptor

 

[Jimmy Boy]

Had one for years

 

[telectrix]

bought one but can't get my fingers in the holes

 

[Jimmy Boy]

bought one but can't get my fingers in the holes

roflmfao

 

[Fred West]

I am so pleased!