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Young college lad who lives near me and who I occassionally give the benefit of my "knowledge and experience" to, presented me with this and asked me why he couldn't use it in a house circuit -- I guess he's been shown/taught it or something at college and was testing out my knowledge in the hope of getting one over on me!. Being the consumate professional I told him of course I knew why, but would take it away just to confirm with some more "experienced electricians" that there weren't any other additional reasons to the ones I knew and would let him know.

Clearly I knew the answer straight away (says he lying thro' his teeth) but eventually sussed it out ....... strange how you actually know the answer to something because you always do it but because its not in the environment you're used to it takes longer to get to that answer!

Edited version of what he gave me below. Any takers who can't get it straight away or am I truely amongst the electrical gods on this forum :smile:

[ElectriciansForums.net] Why cant I use this lighting arrangement ......
 

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Not a good idea! You don't have any polarity so the fitting can be "live" on the threads as you're removing the 'bulb' even though its switched 'off' .......

I thought this as well ,,but both are the same at 55v potential ,, must admit I too thought the same way ,lol,,

I would have thought only double pole switching is the way to go ,,IMO,,
 

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