"Why Are There Two Lives From Separate Circuits At A Light Switch!!!???" | Electrical Fault Finding

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In this electrical fault finding video, I'm called by a customer who says their bathroom down lights stopped working after they flicked the switch on one occasion during regular use. They tried taking them down and replacing the lamps but still had no luck.
I start fault finding and quickly realise that something isn't right when I have a look at the double pole light switch. Then, through a process of elimination; I discover what the issue is.
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Опубликовано:

8 фев 2021

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Комментарии : 36

@dans5101 3 года назад

Thanks for sharing Del mate

@lewistempleman9752 3 года назад

Nice one delroy you're an inspiration

@johnandrews4144 3 года назад

Love the way you say hopefully you picked something up from that,!! Hopefully after reading the comments you have lol, but dont despair we all live and learn you'll know from now on and that's what matters, be a boring world if we all knew everything

@mathman0101 3 года назад

Nice one Del.

@ryanatkins3013 3 года назад

I thought it may be todo with the heater in the bath room for the extra switch possibly good vid tho 👌

@andrewlougher-harris5492 3 года назад

the cables should have been labeled in the switch too inform the next spark

@heronimousbrapson863 3 года назад

I can hear a North American electrician asking: What the heck is a ring circuit?

@JayTheSparky 3 года назад

New build and they’ve fed something from a spur off the ring? Kept it on the same RCD as the lights so no neutral tripping issues

@donellsmith8372 3 года назад

@@darrenqualters2341 canny find your other comment

@stephenhill6479 3 года назад

Good video.Seen it where they put a double pole switch in so one side does lights the other a heater or maybe a fan as an example.

@JaysScript 3 года назад

Very true! Delroy, could it be for a fan maybe? Would this actually work?

@JaysScript 3 года назад

Yes cracked it! ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Qt7ifcSjKWg.html watch that video guys and Delroy. The end bit explains how they can be two lives at a switch. Why they're from 2 different circuits no clue but good video delroy mate

@monikaw1179 3 года назад

@@JaysScript This is NOT the standard way of wiring a fan and light to come on together. I've installed hundreds of them and never used a double pole switch.

@JaysScript 3 года назад

@@monikaw1179 oh no definitely not. Much better ways to go about it

@oldbutstillcurious3615 2 года назад

@@monikaw1179 ? In simple terms, what do you recommend to avoid taking two supplies, each from a different breaker, to a single switching module ?

@k1lmo 3 года назад

I bet the heater in the bathroom isn’t working how you left it

@jamiebaker5690 3 года назад

I was thinking the same, something is now disconnected, its ok, another callout charge when they realise something isn't working haha

@neilvincent9530 Год назад

You can take a lighting from a ring cuurcuit As a electrician I thought you would of known that

@David-dz8jb 3 года назад

Seen and installed dp switches to be used where internal bathrooms/toilets share the same ventilation fan so it avoids commoning the sw live to all the lights. Not seen it spurred from the ring but maybe there is a heavy duty fan motor and that requires this.

@neilvincent9530 Год назад

I always thought you could a lighting curcuit on a ring final curcuit

@fikretsenem7331 3 года назад

Still live because of the fun booster!! You need turn of fun booster too :)

@danf6491 3 года назад

Presume that wire was linked to the extractor or fan heater. Controlled by a double pole switch. Would have been better if they fitted a 2 gang or at least identified the cables. Also I'm sure you meter beeps so some croc clips to stop ya walking back to the fuse board might help. Did the client ever call you back?

@lammy2304 3 года назад

Can’t believe I’ve spent another 5 minutes watching you back and forth to the consumer unit for a second time !! Buy a beeping volt stick !! 🙈🙈

@benh1216 3 года назад

When you mean volt stick I presume you mean voltage pen? Also correct me if I am wrong since I am no electrician but I heard you can't use a voltage pen to prove dead on a circuit? Since I presume that's what you mean in regards to checking the CU.

@lammy2304 3 года назад

@@benh1216 yeah one of them ..... he wouldn’t be using it to prove dead - he’d be listening for the beeping to stop whilst stood at the consumer unit switching off relevant mcb’s to identify the circuit it’s fed from. Then he could prove dead if required. More for identification than proving, one of the best uses of the volt stick/non contact voltage indicators. Saves walking back and forth after turning one mcb off at a time.

@benh1216 3 года назад

@@lammy2304 ahh makes sense. Also yes I do that too. Don't know why I thought he would he using it to prove dead 😂 doh. Very useful piece of kit however. Definitely useful to give you an idea if a circuit is dead or live!

@normanboyes4983 3 года назад

Delroy - I reckon you walked six miles there.😉

@andrewkelsey7777 3 года назад

umbrellas on the CU 🤦‍♂️

@JaysScript 3 года назад

It's a domestic what do you expect? That is totally normal lol

@neilvincent9530 Год назад

How come the tenant seem to know about it very strange

@jujulimbu4443 3 года назад

Hello sir,Can i work with you, I'm nepali

@Electric-First 3 года назад

I had an issue few weeks ago, tenant was complaining about rccb keeps tripping. I carried out IR LN-E and all good >999 M . This happening immediately when tenant switching on washing machine from FCU . I advised tenant change washing machine or call engineer to check it . Tenant has changed washing and it continued tripping rccb. Then i start thinking may be because of dish’s washing machine also connected to the same circuit and may it has small residual current leakage. So , I connected ring circuit to 32 mA rcbo type C and it’s stopped tripping. The problem was caused by small residual current and by Crabtree rccb which was too sensible.

@normanboyes4983 3 года назад

Sensible Crabtree breakers are to be recommended.😉