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Reverse polarity
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<blockquote data-quote="SPECIAL LOCATION" data-source="post: 514005" data-attributes="member: 250"><p>For basic functional and operational aspects, polarity has negligible effect on any domestic appliances...</p><p></p><p>as UK mains supply is an alternating current at 50Hz....</p><p></p><p>Which means 50 times every second the polarity reverses between +/- in relation to earth..</p><p></p><p>So the appliances really don't care which way round the wires are as the supply is alternating....</p><p></p><p>e.g it's not a fixed direct current, (DC) like in you car supplied from a battery!</p><p></p><p>But...</p><p></p><p>In the event of fault...</p><p></p><p>or if trying to turn a circuit off via a single-pole switch..</p><p></p><p>Then dangerous voltages with respect to earth can be present if the polarity is wrong!</p><p></p><p>So basically polarity only becomes a problem during faults and/or maintenance work...</p><p></p><p><img class="smilie smilie--emoji" loading="lazy" alt="😩" title="Weary face :weary:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f629.png" data-shortname=":weary:" /> <img class="smilie smilie--emoji" loading="lazy" alt="😞" title="Disappointed face :disappointed:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f61e.png" data-shortname=":disappointed:" /></p></blockquote><p></p>
[QUOTE="SPECIAL LOCATION, post: 514005, member: 250"] For basic functional and operational aspects, polarity has negligible effect on any domestic appliances... as UK mains supply is an alternating current at 50Hz.... Which means 50 times every second the polarity reverses between +/- in relation to earth.. So the appliances really don't care which way round the wires are as the supply is alternating.... e.g it's not a fixed direct current, (DC) like in you car supplied from a battery! But... In the event of fault... or if trying to turn a circuit off via a single-pole switch.. Then dangerous voltages with respect to earth can be present if the polarity is wrong! So basically polarity only becomes a problem during faults and/or maintenance work... 😩 😞 [/QUOTE]
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