Forums
New posts
Search forums
What's new
New posts
New media
New media comments
Latest activity
Media
New media
New comments
Search media
Members
Current visitors
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Main Forums
Do-It-Yourself (DIY) Question & Answer Forum
Supplementary bonding question
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Help Support Talk Electrician Forum:
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="TomLonsborough" data-source="post: 493372" data-attributes="member: 32431"><p>Alright folks,</p><p></p><p>Looking for a bit of advice with supplementary bonding. Bit of background - I'm in the process of repairing some metal bollards: I decided the best option was to rip out the old guts which comprised of some old fluorescents complete with all the control gear and no IP rating, and replace it with an IP rated LED flood. Supply is via SWA into a fused block; I've terminated the included LED flex into this block.</p><p></p><p>Question is this: do the bollards require bonding?</p><p></p><p>Initially I thought no, because they are simply a housing for the self-contained flood and the block. However upon taking a continuity reading between certain parts of some of the bollards and the MET, I was getting around 3 Ohms. R &lt; 50A/100 (C 10A MCB) is therefore not satisfied. I decided to add fly-leads connected to the block via bolts screwed into the bollard housing. Problem is the because of the condition of the bollards, i.e. rusty, painted in parts, continuity readings now vary from 0.2 Ohms to no reading at all. An insulation resistance test between MET and various parts of the bollards are also coming back as not satisfactory, i.e. &lt;22000 Ohms. Am I potentially introducing a potential here under fault conditions with these fly leads which would not be present otherwise? Save for replacing the bollards with shiny new ones altogether, I'm not sure what I could do!</p><p></p><p>Any advice would be gratefully received!</p><p></p><p>Tom.</p><p></p><p>TL;DR Supplementary bonding of rusty metal bollards! Necessary or not?</p><p> </p></blockquote><p></p>
[QUOTE="TomLonsborough, post: 493372, member: 32431"] Alright folks, Looking for a bit of advice with supplementary bonding. Bit of background - I'm in the process of repairing some metal bollards: I decided the best option was to rip out the old guts which comprised of some old fluorescents complete with all the control gear and no IP rating, and replace it with an IP rated LED flood. Supply is via SWA into a fused block; I've terminated the included LED flex into this block. Question is this: do the bollards require bonding? Initially I thought no, because they are simply a housing for the self-contained flood and the block. However upon taking a continuity reading between certain parts of some of the bollards and the MET, I was getting around 3 Ohms. R < 50A/100 (C 10A MCB) is therefore not satisfied. I decided to add fly-leads connected to the block via bolts screwed into the bollard housing. Problem is the because of the condition of the bollards, i.e. rusty, painted in parts, continuity readings now vary from 0.2 Ohms to no reading at all. An insulation resistance test between MET and various parts of the bollards are also coming back as not satisfactory, i.e. <22000 Ohms. Am I potentially introducing a potential here under fault conditions with these fly leads which would not be present otherwise? Save for replacing the bollards with shiny new ones altogether, I'm not sure what I could do! Any advice would be gratefully received! Tom. TL;DR Supplementary bonding of rusty metal bollards! Necessary or not? [/QUOTE]
Insert quotes…
Verification
Post reply
Main Forums
Do-It-Yourself (DIY) Question & Answer Forum
Supplementary bonding question
Top