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Topic Title: Earthing Conductor Installation / High Zs
Topic Summary:
Created On: 21 January 2019 08:53 AM
Status: Read Only
Linear : Threading : Single : Branch
 Earthing Conductor Installation / High Zs   - PWatts - 21 January 2019 08:53 AM  
 Earthing Conductor Installation / High Zs   - AJJewsbury - 21 January 2019 12:20 PM  
 Earthing Conductor Installation / High Zs   - gkenyon - 21 January 2019 01:56 PM  
 Earthing Conductor Installation / High Zs   - chrispearson - 21 January 2019 01:59 PM  
 Earthing Conductor Installation / High Zs   - OMS - 21 January 2019 02:35 PM  
 Earthing Conductor Installation / High Zs   - PWatts - 21 January 2019 03:56 PM  
 Earthing Conductor Installation / High Zs   - Alcomax - 21 January 2019 04:21 PM  
 Earthing Conductor Installation / High Zs   - PWatts - 21 January 2019 04:24 PM  
 Earthing Conductor Installation / High Zs   - Alcomax - 21 January 2019 05:37 PM  
 Earthing Conductor Installation / High Zs   - chrispearson - 22 January 2019 09:48 AM  
 Earthing Conductor Installation / High Zs   - AJJewsbury - 22 January 2019 11:01 AM  
 Earthing Conductor Installation / High Zs   - mapj1 - 22 January 2019 11:06 AM  
 Earthing Conductor Installation / High Zs   - John Peckham - 22 January 2019 11:06 AM  
 Earthing Conductor Installation / High Zs   - PWatts - 22 January 2019 04:21 PM  
 Earthing Conductor Installation / High Zs   - mapj1 - 22 January 2019 04:27 PM  
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 22 January 2019 11:06 AM
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John Peckham

Posts: 9097
Joined: 23 April 2005

I have just run that through my Amtech. I used 180m of 120mm. The maximum Zs is calculated at 0.1306 ohms and the calculated Zs is 0.1306 ohms, which just squeaks in.

I would suggest there is a fault. Has the paint been removed under the SWA glands, is the banjo present and bolted through, if either end has a removable gland plate is there a flying earth from the plate to the earth bar? Can you examine the joint or is it encapsulated? Can you measure R1 + R2?

-------------------------
John Peckham

http://www.astutetechnicalservices.co.uk/
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