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xkcd #2880: Sheet Bend
(imgs.xkcd.com)
Alt text:
A left-handed sheet bend creates a much weaker connection, especially under moderate loads.
That
is one mother fucking cursed connector
it's brilliant because it's so hazardous yet still creates a contact between two double core wires.
Additionally, the next "wire" would be connected reversed polarity so you would never know if grey or yellow were hot.
why would it be connected with reversed polarity?