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
Low Mains Voltage (~190-220v) - How to resolve?
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="SPECIAL LOCATION" data-source="post: 503769" data-attributes="member: 250"><p>Appendix 2 of BS7671 states the supply voltage as 230v +10% -6%</p><p></p><p>which is 216.2V to 253.0V This is the bit the supply company have to comply with..</p><p></p><p>And Appendix 4 give max permissible voltage drop.</p><p></p><p>This is the bit you, (your electricians), have to comply..</p><p></p><p>As I said earlier just banding around a voltage figure without any circuit characteristics is like me asking you to explain why our shopping is £45 more than the next door neighbours..</p><p></p><p>(insufficient information)</p><p></p><p>But lets take a hypothetical example..</p><p></p><p>If the supply at your meter is was 216v... {bottom end of DNO's tolerance}</p><p></p><p>and you have a 20A load at the end of a 30m length of 2.5mm T&amp;E cable...</p><p></p><p>the volt drop would be 10.8v giving 216-10.8= 205.2v</p><p></p><p>You need to do a thorough analysis of your whole installtion.</p><p></p><p>Without that you are just guessing!</p></blockquote><p></p>
[QUOTE="SPECIAL LOCATION, post: 503769, member: 250"] Appendix 2 of BS7671 states the supply voltage as 230v +10% -6% which is 216.2V to 253.0V This is the bit the supply company have to comply with.. And Appendix 4 give max permissible voltage drop. This is the bit you, (your electricians), have to comply.. As I said earlier just banding around a voltage figure without any circuit characteristics is like me asking you to explain why our shopping is £45 more than the next door neighbours.. (insufficient information) But lets take a hypothetical example.. If the supply at your meter is was 216v... {bottom end of DNO's tolerance} and you have a 20A load at the end of a 30m length of 2.5mm T&E cable... the volt drop would be 10.8v giving 216-10.8= 205.2v You need to do a thorough analysis of your whole installtion. Without that you are just guessing! [/QUOTE]
Insert quotes…
Verification
Post reply
Main Forums
Do-It-Yourself (DIY) Question & Answer Forum
Low Mains Voltage (~190-220v) - How to resolve?
Top