Meter tail - CU >25m

[Balarizaaf]

Hi Guys!

I have a big job incomming and I am a bit confused how to do one thing. I am supposed to do full rewiring of an apartment house. First, I need to place a tails from meter to CU. Length of the tail will be up to 25 meters. How am i supposed to ensure protection of this tail and what size of it should I use?

 

[Guitarist]

Hi Guys!

I have a big job incomming and I am a bit confused how to do one thing. I am supposed to do full rewiring of an apartment house. First, I need to place a tails from meter to CU. Length of the tail will be up to 25 meters. How am i supposed to ensure protection of this tail and what size of it should I use?

Why did you accept the job if you don't know how to do this?

 

[Darkwood]

You are not permitted to have tails this length ... you will have to have a fused isolator and the CU supply will then be a submains ... then use your cable calcs to assess what size cable you require.

 

[Balarizaaf]

Why did you accept the job if you don't know how to do this?

i know and i am checking if yu know.

 

[Thefailsafe2012]

Wiiiiind up!

 

[Balarizaaf]

Re: Meter tail - CU >25m

You are not permitted to have tails this length ... you will have to have a fused isolator and the CU supply will then be a submains ... then use your cable calcs to assess what size cable you require.

I know i can , but i need to protect that cable with fuse or rcd

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Goshhh... Why do yu hate me so much:/

 

[Thefailsafe2012]

Re: Meter tail - CU >25m

I know i can , but i need to protect that cable with fuse or rcd

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Goshhh... Why do yu hate me so much:/

YOU as the designer and installer should know exactly what you need to do!

 

[Balarizaaf]

Re: Meter tail - CU >25m

YOU as the designer and installer should know exactly what you need to do!

I just need to be double sure

 

[Darkwood]

i know and i am checking if yu know.

Be careful how you phrase responses this can be taken a few ways .....

You could be trolling here if you read this one way or actually saying are unsure how to do it and your asking for advice... this info is in the OSG regarding tail length lets hope you are just asking for a refresher as you haven't needed to implement these regs before and its slipped your mind but honestly its easy to look this one up in the BS7671

 

[Balarizaaf]

Re: Meter tail - CU >25m

Writing with yu guys is like walking on a broken glAss:/
i know i can chck this and drfinietly i am gonna do it... I just thought we can make perfectly nice conversation here...

 

[Thefailsafe2012]

Re: Meter tail - CU >25m

I just need to be double sure

But we haven't heard your input yet mate!

 

[Guitarist]

Re: Meter tail - CU >25m

Writing with yu guys is like walking on a broken glAss:/

Just trust your own abilities then if we are so bad

 

[Darkwood]

Re: Meter tail - CU >25m

I know i can , but i need to protect that cable with fuse or rcd

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Goshhh... Why do yu hate me so much:/

We are not against you .. when you ask a question we have to assume you competence and as your profile says you are an electrician this is one of those questions that really is expected of an apprentice at most ... that aside we all have our blonde days so if your going to ask a question try changing your approach.. you'll see a totally different response well except some who find it easy to slate but don't often offer good advice...

E.G.

Hey guys ... im having one of them brain freezes - y consumer unit is 25m away from the cutout so i propose having a 63amp fused isolator next to the cutout and running Xmm cable to CU - does this sound ok ..please advice

.....
Your responses to the same question will be more then helpful if you think on how to word it better.

 

[7029 dave]

3 meters max for double insulated tails, otherwise you r into subs.

 

[GMES]

there is a new diy forum maybe this should be sent there, nobody is trying to be offensive but this is basic stuff as darkwood said get your books out and study them.