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my halogen downlights have always dimmed when shower running, same way my site lite sometimes goes off for a sec when using a mitre saw or something similar,
I disagree - it might be, and should be checked out for peace of mind - if there's a poor connection with a high resistance in the cutout/meter/CU then bad things can happen.It's not dangerous or anything to worry about.
It's very rare to see an electric shower that doesn't casue the lights to dim. I fitted hundreds of showers into disabled bathroom conversions for Leeds city council. Every one of those houses / flats must have had a high resistance joint on the incommer.
It's great knowing the theory, but things are different when you get out there working on installations in the real world.
True, but I'm not sure it's sad - have you noticed the name and purpose of this forum?Sadly not many on the forum do - there's a lot of armchair electricians here.It's great knowing the theory, but things are different when you get out there working on installations in the real world.
True.In any event, there is not usually any lack of people advising that testing is required in order to confirm that some very unlikely problem is not present, so I'm a little surprised to see a change of attitude in relation to the scenario being discussed here.
Indeed - and we know that pilots rigorously go through their interminable list of pre-flight checks despite knowing that they may well get through a whole flying career without such checks ever revealing any life-threatening problem. When it comes to any safety-critical situation, the fact that things are 'nearly always OK' is a pretty poor excuse for not undertaking checks/tests ... in my opinion, from my armchair!True. I wonder how many of the "non-armchair" electricians here go for years without finding any problems with their installation work, but still test every time?
Nope, but the airmchair on which I'm sitting has legs only about 3 inches long, so I know there is no meaningful risk of any catastrophe. ... but you're at risk of undermining 'our' side of this argument!Did you check that none of the legs had developed a potentially catastrophic crack before you sat in it?
I'm sure no-one is suggesting that there should be any concerns if turning on a shower has caused lights to dim 'for years'. However, if there is marked dimming when a newly-installed shower is switched on or, far more important, if dimming suddenly starts occurring ('for no apparent reason') after having previously not been experienced, then surely there is a strong case for 'testing to be sure'?
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