Extraxtor fan

[sajeel]

Hi

Can i take a feed from socket ring to make spur and take feed from light switch, if i twist two neutrals together one from lighting and one form socket will this work or will it trip out mcb ?

Saj

 

[Steve]

NO
NO
NO
NO

So much a bout this is wrong.

Least of all:
No fusing
Twisting wires together.

Please call an electrician.

 

[sajeel]

I am an electrician, supply would be fused from spur and isolator switch would be fitted, i just wanted to clarify if i twist the neutral from socket feed and light feed together if mcb or rcd would trip, as in uk the neutral is tied down to earth at transformer in most uk TN-S supply.

 

[Spark123]

I am an electrician,

You failed to mention it was on your mothers side of the family

 

[ricicle]

TROLL

 

[ColJack]

I am an electrician...

you're a liar.....

no way would even a year 1 electrical trainee ask whether you can "twist together" neutrals from seperate circuits..

there's just SO much wrong with that concept that if you are charging for your services that I suggest you switch to gardening.. at least that way no one will die..

you also say "in the uk" which I take it means that you are one of our many foreign invaders?

you may be fully qualified in your own country but they don't mean jack over here and you need to go back to school to learn the local methods and rules if you're going to be working here..

 

[sajeel]

Great bunch thank you all for your help NOT !!!

Firstly i am qualified City and Guilds 2381 16th Edition in 2003

Secondly i am a british born citizen

Thirdly the only reason i asked was for help not useless replies.

Lastly if anyone you who made comments are not qualified up to 16th edition then i suggest you keep comments to your self.

 

[loosenup]

I am interested here.
Other than not good practice , oh and twisting the wires together ( he does not even mention insulation tape ) Why could you not pick up a neutral from another circuit ( discounting cable sizes and loading here ) because , lets assume there's a consumer unit with 100amp main switch and all circuits have thier own rcbo, are not the neutrals all joined at the same point in the board ?
Phill

 

[sparkwright]

so, saj, what is it exactly you're trying to do? there must be a better way...

 

[flameport]

Why could you not pick up a neutral from another circuit

1. BS7671 does not permit this and never has.
2. If circuits are interconnected, isolation of one circuit becomes impossible, as all of the interconnected circuits would have to be isolated as a group.
3. Interconnections will result in currents flowing in unpredictable ways, possibly leading to cables being overloaded.
4. If RCBOs or RCDs are used on the interconnected circuits, it is highly likely they won't even switch on. If one of the interconnected circuits has a RCD and the other does not, the RCD will trip but the circuit would remain in a live and dangerous condition, making the additional protection from the RCD useless.

 

[ricicle]

Lastly if anyone you who made comments are not qualified up to 16th edition then i suggest you keep comments to your self.

 

[ColJack]

we're up to 17th edition nowadays.. so your 16th edition is useless now..

also, regs only doesn't make you an electrician..
you need experience and a practical qualification such as 236 or 2330..


so..

I connect my bathroom lighting neutral to the shower neutral..
and the shower neutral breaks or comes loose from the neutral bar for whatever reason..
the shower continued to work but you're neutral path for the 40 or so amps is now only 1mm² CSA...

THAT's why you can't do it..

 

[sajeel]

we're up to 17th edition nowadays.. so your 16th edition is useless now..

also, regs only doesn't make you an electrician..
you need experience and a practical qualification such as 236 or 2330..


so..

I connect my bathroom lighting neutral to the shower neutral..
and the shower neutral breaks or comes loose from the neutral bar for whatever reason..
the shower continued to work but you're neutral path for the 40 or so amps is now only 1mm² CSA...

THAT's why you can't do it..

Coljack

you are very harsh with your words, but i understand what you mean about if there was a current leak and the problem, i by mistake ran a spur feed from socket instead of light feed as customer was rushing for deadline, then realized i had a issue, i guess my only option is to install a pull switch fan as this can work of socket feed.

 

[sajeel]

Thank you to those who made a decent reply, i ran feed from socket feed by mistake, under pressure to meet deadline by customer, i ran a light feed to use a timer fan using light swtich, but i believe cannot do that as i would have to twist two neutral together as i cannot use just the live wire to control timer function, so i believe the only option is to use an extractor with a pull switch cord.



P.S. I am currently doing 17th Edition update, and have electrical experience, as humans we can make mistakes.

 

[RF Lighting]

There is a difference between making a mistake, and unbeleivable incompetence