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Topic Title: Low current Zs test tripping RCBO
Topic Summary:
Created On: 24 March 2019 08:53 PM
Status: Read Only
Linear : Threading : Single : Branch
 Low current Zs test tripping RCBO   - Sparkymania - 24 March 2019 08:53 PM  
 Low current Zs test tripping RCBO   - mapj1 - 25 March 2019 09:24 AM  
 Low current Zs test tripping RCBO   - chrispearson - 25 March 2019 11:52 AM  
 Low current Zs test tripping RCBO   - RB1981 - 25 March 2019 03:26 PM  
 Low current Zs test tripping RCBO   - KFH - 25 March 2019 04:37 PM  
 Low current Zs test tripping RCBO   - RB1981 - 25 March 2019 04:41 PM  
 Low current Zs test tripping RCBO   - Sparkymania - 25 March 2019 08:03 PM  
 Low current Zs test tripping RCBO   - mapj1 - 25 March 2019 09:14 PM  
 Low current Zs test tripping RCBO   - Sparkymania - 25 March 2019 09:29 PM  
 Low current Zs test tripping RCBO   - AJJewsbury - 26 March 2019 09:34 AM  
 Low current Zs test tripping RCBO   - Sparkymania - 26 March 2019 10:46 PM  
 Low current Zs test tripping RCBO   - Sparkymania - 27 March 2019 06:55 PM  
 Low current Zs test tripping RCBO   - RB1981 - 27 March 2019 08:02 PM  
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 26 March 2019 10:46 PM
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Sparkymania

Posts: 6
Joined: 24 March 2019

According to Guidance note 3 you can use a loop impedance test on periodic testing to prove continuity of protective conductor as well as getting Zs.
We Lim the r1+r2 as this would take far to long with the amount of testing taking place; universities, council offices etc.This is already agreed with the client.
Therefore, I hope this is a one off and not a situation we will see in the future.
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