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
size of tails
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="binky" data-source="post: 19908" data-attributes="member: 490"><p>25mm tails for 100A, 16mm tails fine up to 80A - check the big red book for single core wires (table at back)</p><p></p><p>100% of fuse carriers in my local area say 100A, but standard fuse is 80A or 60A - check meter, fuse is set to protect meter, old wheal type are rated at 80A, its written on the front (newer digital ones are rated at 100A, but fuses not upgraded at same time as changing to new meter anyway).</p><p></p><p>The 25mm bit is yet another stupid catch all <em><strong>recommendation</strong></em> and not a regulatory requirement. 16mm if fine, it will carry 80A and therefore fuse will blow before cable melts.</p><p></p><p>There is another argument that says if max current draw is eg 40A (separate cooker circuit or shower) then 6 or 10mm tails are fine 'cos they will never need to support 80A. But I think this is wrong, purely because of the lack of protection for the tails, even if it is very common on older installations.</p></blockquote><p></p>
[QUOTE="binky, post: 19908, member: 490"] 25mm tails for 100A, 16mm tails fine up to 80A - check the big red book for single core wires (table at back) 100% of fuse carriers in my local area say 100A, but standard fuse is 80A or 60A - check meter, fuse is set to protect meter, old wheal type are rated at 80A, its written on the front (newer digital ones are rated at 100A, but fuses not upgraded at same time as changing to new meter anyway). The 25mm bit is yet another stupid catch all [I][B]recommendation[/B][/I] and not a regulatory requirement. 16mm if fine, it will carry 80A and therefore fuse will blow before cable melts. There is another argument that says if max current draw is eg 40A (separate cooker circuit or shower) then 6 or 10mm tails are fine 'cos they will never need to support 80A. But I think this is wrong, purely because of the lack of protection for the tails, even if it is very common on older installations. [/QUOTE]
Insert quotes…
Verification
Post reply
Main Forums
Do-It-Yourself (DIY) Question & Answer Forum
size of tails
Top