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Topic Title: Continuity of CPC. Continuity test method 1
Topic Summary: Size of the temporary link
Created On: 20 February 2014 10:30 AM
Status: Post and Reply
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 20 February 2014 10:30 AM
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Peewee

Posts: 9
Joined: 05 March 2013

Hi, Are there any notes on the size of the bridge from line to protective conductor?
I can't see anything in my books, my gut feeling would be to use the same size as the line conductor from the circuit i'm testing?
Can anyone offer any definitive answers on this?
Thanks
Pete
 20 February 2014 10:35 AM
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marclambert

Posts: 309
Joined: 23 June 2010

My idea of a temporary link is to remove both conductors and connect together. Never use link as per drawings in OSG and GN3. They can and have been forgotten.
Solves your question too?
regards
Marc
 20 February 2014 10:42 AM
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OMS

Posts: 19461
Joined: 23 March 2004

What is the accuracy of the instrument ?

What impact on the measured results would say the variation between 1.5mm2 or 2.5mm2 copper of say 150mm long have - what would that be as a % of the measured test result?

Would a change in temperature have more or less of an effect ?

In essence, how definitive is the test result anyway ?

If I suggested, that it did not exceed 0.05 Ohm would you find that credible

Regards

OMS

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Failure is always an option
 20 February 2014 10:53 AM
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marclambert

Posts: 309
Joined: 23 June 2010

I suppose if you really wanted to use a link it's csa wouldn't matter. Just null it out when you null the leads.
Simples!
But still don't do it
 20 February 2014 02:00 PM
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dickllewellyn

Posts: 1150
Joined: 19 March 2010

I tend to test one at a time by outing the line conductor into the earth bar. It's one of those things that everyone will have a different method!

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Richard (Dick)

"Insert words of wisdom and/or witty pun here"
 20 February 2014 02:27 PM
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daveparry1

Posts: 6104
Joined: 04 July 2007

When i'm doing c/unit changes I find the lever type Wago's very useful especially when cross-connecting L & E for ring tests etc.
 20 February 2014 03:02 PM
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marclambert

Posts: 309
Joined: 23 June 2010

Me too Dave,
hold em together with your teeth even, anything but links.
If you leave a link in a BS88 DB and energise, for sure the fuse will blow but if you're stood in front of the board on top of steps at the time......a step backwards could well hurt.
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