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What should the voltage be across the mains switch when off?
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<blockquote data-quote="Xerxel" data-source="post: 492709" data-attributes="member: 32372"><p>Hi</p><p></p><p>In my (new) consumer unit, there are 3V across the Neutral bar and the earth bar, when the mains is off. There is also 53V across the mains switch from L to N when it's off and 44V between the line supply and line out. Is this normal when the mains switch is off? Isn't N and Earth connected together at some point therefore should be 0 volts difference?</p><p></p><p>Could this explain why my LED bulbs never switch off but only go dim when switched off via a wall switch?</p><p></p><p>See pics for actual readings - does anyone know what the readings should be in a good installation?</p><p></p><p>Thanks in advance...</p><p></p><p><img src="https://talk.electricianforum.co.uk/uploads/imageproxy/235.jpg.e65d98a220e188750e384cce369be305.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><img src="https://talk.electricianforum.co.uk/uploads/imageproxy/30.jpg.dba6fdbe7c50c7ac355e03d52ffc5872.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><img src="https://talk.electricianforum.co.uk/uploads/imageproxy/44.jpg.61f99a39c7d894e6028722158a5e71ee.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><img src="https://talk.electricianforum.co.uk/uploads/imageproxy/53.jpg.0bfb961960dbdcc0a018ce18011d5fb4.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="Xerxel, post: 492709, member: 32372"] Hi In my (new) consumer unit, there are 3V across the Neutral bar and the earth bar, when the mains is off. There is also 53V across the mains switch from L to N when it's off and 44V between the line supply and line out. Is this normal when the mains switch is off? Isn't N and Earth connected together at some point therefore should be 0 volts difference? Could this explain why my LED bulbs never switch off but only go dim when switched off via a wall switch? See pics for actual readings - does anyone know what the readings should be in a good installation? Thanks in advance... [IMG]https://talk.electricianforum.co.uk/uploads/imageproxy/235.jpg.e65d98a220e188750e384cce369be305.jpg[/IMG] [IMG]https://talk.electricianforum.co.uk/uploads/imageproxy/30.jpg.dba6fdbe7c50c7ac355e03d52ffc5872.jpg[/IMG] [IMG]https://talk.electricianforum.co.uk/uploads/imageproxy/44.jpg.61f99a39c7d894e6028722158a5e71ee.jpg[/IMG] [IMG]https://talk.electricianforum.co.uk/uploads/imageproxy/53.jpg.0bfb961960dbdcc0a018ce18011d5fb4.jpg[/IMG] [/QUOTE]
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What should the voltage be across the mains switch when off?
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