electrical switch polarity

Hi, I've seen one of the tests on domestic circuits to be a polarity test on amongst other things switches (and sockets?). Could someone explain this to me please.
Would the Electricians Guide to the Regs explain this sort of thing?
Thank you,
Neil
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On Tue, 16 Sep 2003 20:51:25 +0000 (UTC), Niel A. Farrow wrote:

It's to make sure that the socket hasn't been wired wrongly, such that the live and neutral are transposed. If they were, then switching off at the plug would leave an appliance switched off (because the neutral is disconnected), but still energised at mains voltage.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
The polarity test is indeed carried out on switches and sockets to ensure the switches are connected to the phase conductor , it is simply done by connecting a continuity tester betneen phase and neutral and operating the switch. The electricians guide will explain this test
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

You can buy a plug 'top' with neons built in for a couple of pounds which will test a socket for the correct connections. It won't test other requirements, though.
--
*Can fat people go skinny-dipping?

Dave Plowman snipped-for-privacy@argonet.co.uk London SW 12
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On Wednesday, September 17, 2003 2:21:27 AM UTC+5:30, Niel A. Farrow wrote:

http://www.rlkswitches.com/
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On Sun, 26 May 2013 22:25:50 -0700 (PDT), snipped-for-privacy@gmail.com wrote:

Look, why don't you fuck off?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On Monday, May 27, 2013 10:33:13 AM UTC+1, Grimly Curmudgeon wrote:

Funny how some companies like to make such a scummy name for themselves.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.