I am replacing a couple of wall lights. With the mains power off, I get no resistance between the bear earth wire and the neutral wire at the wall; they seem to form a circuit. This strikes me as strange but the old lights worked well and had an earthing point. There is no resistance between the switch earth and the wall earth, as I would expect. With the switch on there is a high but measureable resistance between the earth and the live at the wall.
Hi, sounds perfectly normal to me IF,
your main switch is on but circuit live isolated by fuse/mcb . Your low resistance circuit from neutral to earth will be because they are linked together at supply.
since switch and light earths are connected together you should indeed see a low resistance, similar to if you touch your meter probes together.
with switch 'on' the path from line to earth will be via lamps in circuit to Neutral and back to earth at supply, thus high but readable resistance,
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