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1 - Depends on the fitting. If it's a bayonet, one pin is live, one is neutral. As I understand it, it shouldn't matter. Just make sure if you use a single pole switch, you switch on the line (although the one below is double pole, IE switches line and neutral).
2 - 3amp would be fine, I=P/V, so if it's a 50w bulb, it'll only need 0.2A of current.
3 - This looks nice/vintage https://edisonlightglobes.com/Shop/shop/hardware/plugs-and-switches/black-10a-inline-switch-240v-2/Also, if it has a metal case/exposed metal bits, I'd probably add an earth.
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I'd started to answer before realizing there was a new page and @nefarious had beaten me to it:
- Yes if it's edison screw (centre connection should be live)
- Small. 3A is probably the most common for a lamp, and the current drawn by an LED bulb is very low though you might be using an older filament bulb.
- I've recently used one of these with a 1950s Anglepoise, though cable clamping is by a cunning half hitch rather than screws etc.
https://www.ebay.co.uk/itm/Inline-ON-OFF-Table-Lamp-Desk-Light-Cord-Cable-Switch-with-LED-Max-220V-10A-UK/223632998693?ssPageName=STRK%3AMEBIDX%3AIT&var=522364937563&_trksid=p2057872.m2749.l2649
Also had to go back to an older glass bulb because modern LED things aren't heavy enough to balance with the existing springs...
- Yes if it's edison screw (centre connection should be live)
Nef
MrE
@hugo7
I've got an old lamp with two wires that needs a plug. Ie no earth.
Questions:
Cheers