Rewiring to a garage

[butchtaylor909]

Probably a reasonable call to make, outline the "issues" and then how you intend to deal with it, seeking their views .... that way they can tell you have thought about the "job" rather than assuming they will give you the answers.

A bit like using this forum... outline issues, suggest your solution (as you did) and then respond to points raised - which you have - and this is the best way to get the most out of the "virtual" team.

Which scheme are you with?

working through NICEIC towards DI

 

[buzzlightyear]

butchtaylor909 some of the questions. that asked on this forum
we can not do the job for you .
we can only give you advice may be one of the sparks on this forum could call to the job in question and give advise.

 

[westward10]

If you can prove the tube in the wall is effectively earthed then a non metal sheathed cable can be used without additional rcd protection. You need to assertain whether main protective bonds are required in the garage, if not you can ignore the separate 10.0 cpc requirement. I would avoid using YY, CY or SY cable because it is not recognised for use in this country. 10.0 T&E is fine with a separate 10.0 if required for main protective bonding.

 

[butchtaylor909]

butchtaylor909 some of the questions. that asked on this forum
we can not do the job for you .
we can only give you advice may be one of the sparks on this forum could call to the job in question and give advise.

I never wanted anyone to do the job for me,
I had a problem,
I had come up with a solution,
I just wanted some advice as to if there were any problems with doing it that way.

A simple yes mate that's fine or no mate have you considered x,y,z... would do

 

[butchtaylor909]

If you can prove the tube in the wall is effectively earthed then a non metal sheathed cable can be used without additional rcd protection. You need to assertain whether main protective bonds are required in the garage, if not you can ignore the separate 10.0 cpc requirement. I would avoid using YY, CY or SY cable because it is not recognised for use in this country. 10.0 T&E is fine with a separate 10.0 if required for main protective bonding.

Thank you. i had planned to test the conduit next time i am on site. cannot remember if the sink had plastic or metal pipes, so had planned to be checking that too.
last time i say YY cable was during my 21 years in the military so i know about it but was not sure about its domestic use as i am still relatively new to this.

 

[buzzlightyear]

how long have you been qualified sorry to ask you.

 

[westward10]

Avoid all those YY, CY and SY cables even though you see it installed everywhere.

 

[butchtaylor909]

how long have you been qualified sorry to ask you.

Few months, Been working with others doing simple jobs but want get to registered and head off on my own.

 

[buzzlightyear]

Been working with others doing simple jobs

I what way!

 

[butchtaylor909]

extension to existing circuits, replacing accessories, CU change, full rewire, first and second fix on a renovation. simple stuff, nothing where i have had to join cables at anything other than an accessory, which is why i needed to ask about this job, not because i did not know but more because the more i thought about it the more i doubted myself.

 

[buzzlightyear]

but want get to registered and head off on my own.

did you work with a firm.

 

[butchtaylor909]

not currently i was doing work with a NICEIC electrician that lived nearby until he gave up due to ill health last week.

currently sat at home twiddling thumbs and doing what ever jobs i can get

 

[Ian1981]

Agreed sy,yy and cy cables are not made to a British standard and you would have to depart from bs 7671 if using them for fixed wiring.
They are commonly used for control wiring and aircon.
The on site guide warns about using such cables.

 

[butchtaylor909]

Agreed sy,yy and cy cables are not made to a British standard and you would have to depart from bs 7671 if using them for fixed wiring.
They are commonly used for control wiring and aircon.
The on site guide warns about using such cables.

From memory they are made to a British standard, BS EN 50525 iirc.

 

[Ian1981]

From memory they are made to a British standard, BS EN 50525 iirc.

They claim to be that is all

 

[westward10]

Problem with SY is do you earth the braid and if you do what calculations are you going to employ to verify its capacity for carrying fault current because the chances of finding out its resistance are zero.

 

[DPG]

Braid can't carry fault current can it?

 

[buzzlightyear]

not currently i was doing work with a NICEIC electrician that lived nearby until he gave up due to ill health last week.

may be you should look for a firm, that will give you more experience
before you make a leap of faith by joining the niceic

 

[westward10]

Braid can't carry fault current can it?

This is the grey area, people say it should be earthed in case it becomes live opening up the problem can it carry fault current.

 

[Ian1981]

Problem with SY is do you earth the braid and if you do what calculations are you going to employ to verify its capacity for carrying fault current because the chances of finding out its resistance are zero.

Apparently the braid isn't to be used as a cpc anyway it's for screening only.
I even read an niceic article which dismisses the braid as even being an exposed conductive part as it cannot withstand fault currents.
Go figure

 

[westward10]

Well I don't believe it needs earthing but those who feel it should in case it becomes live need to calculate its capacity to carry fault current.

 

[DPG]

Definitely can't carry fault current but should always be earthed. Tin hat on and bonded.

 

[Ian1981]

Just don't use it and you have no problem

 

[DPG]

Agreed. The only reason I'd use it in my house is because I always like the look of it. Good reason really. Maybe the 18th should have a section on aesthetics.

 

[Wilko]

Definitely can't carry fault current but should always be earthed. Tin hat on and bonded.

I hope @butchtaylor909 and Everyone won't mind a distraction. I'm not in the best frame tonight so it's time for the bonded tin hat joke :

 

[westward10]

Definitely can't carry fault current but should always be earthed. Tin hat on and bonded.

Should always be earthed, can't carry fault current how does that work.

 

[DPG]

Should always be earthed, can't carry fault current how does that work.

Not everything that is earthed is designed to carry fault current.

 

[Dave OCD]

Agreed. The only reason I'd use it in my house is because I always like the look of it. Good reason really. Maybe the 18th should have a section on aesthetics.

That would be interesting, so much of what I see would fail then !