Had some line/neutral reverse polarity today at a job instead of tripping RCD/MCB it’s just melted socket outlet how come RCD/MCB didn’t trip? RCD tested fine??
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Discuss Reverse polarity at socket outlets in the UK Electrical Forum area at ElectriciansForums.net
Did you check the plug? did you check the tightness of the connections in the socket outlet?, did the cables appear burnt?, reversed polarity does not normally cause any trips, any IR testing done????? lots of question I know.Had some line/neutral reverse polarity today at a job instead of tripping RCD/MCB it’s just melted socket outlet how come RCD/MCB didn’t trip? RCD tested fine??
With socket-outlets the major issue is that the fuse in the plugtop (there's a word to annoy some!) will be in the neutral conductor rather than the line/phase conductor.I think with reverse polarity the main problem is with switching - the switch cuts out the live which in this case is the neutral so any devices plugged in would still in effect, live when the socket is switched off (potentially very dangerous)
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