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
Electrician Talk Forum
Bonding....
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="IzzyS" data-source="post: 396874" data-attributes="member: 11110"><p>To test an existing in-service installation, I turn off the main switch (safe isolation etc), then disconnect the main earthing conductor and test between that and the suspected extraneous-conductive-part. This removes fortuitous paths, such as a cpc connection to the immersion heater in a copper hot water cylinder, the gas or oil pipe bond, or the central heating boiler cpc.</p><p></p><p>It's not a true test of the pipe alone, as for example, a heating boiler sitting on a wet concrete floor can introduce earth potential.</p><p></p><p>However, if it the overall result &gt;23kOhms then the part under test is not considered to be an e-c-p and no bonding is required (See GN8), anything less then bonding is required.</p></blockquote><p></p>
[QUOTE="IzzyS, post: 396874, member: 11110"] To test an existing in-service installation, I turn off the main switch (safe isolation etc), then disconnect the main earthing conductor and test between that and the suspected extraneous-conductive-part. This removes fortuitous paths, such as a cpc connection to the immersion heater in a copper hot water cylinder, the gas or oil pipe bond, or the central heating boiler cpc. It's not a true test of the pipe alone, as for example, a heating boiler sitting on a wet concrete floor can introduce earth potential. However, if it the overall result >23kOhms then the part under test is not considered to be an e-c-p and no bonding is required (See GN8), anything less then bonding is required. [/QUOTE]
Insert quotes…
Verification
Post reply
Main Forums
Electrician Talk Forum
Bonding....
Top