Garage install- incoming configuration

[shocking_eg]

I am less concerned about the earthing arrangement. My initial concerns were with regards to the meter configuration and whether the armouring should be earthed at both ends.

You only need to earth at one end. But I have always done both ends

Helps keep your ZE low

 

[GLENNSPARK]

that 25mm 3rd core will serve as cpc and bonding conductor. if the garage is going to be living accom., then surely there will be water supply and maybe gas as well.

yep....you`d get some tryin to tug a length of 10mm G/Y in here n all....
no need....

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You only need to earth at one end. But I have always done both ends

Helps keep your ZE low

25mm CSA ....and your goin on about Zdb....lol....

 

[atm84]

I always thought it was ok to earth one end of armouring till a college lecturer once told me both ends should be earthed in case of difference in potential occurred between the armouring at the unearthed end and the interval cpc.

 

[rmc86uk]

I never understand why people gland into a metal apatable box at the side of a metal CU? Why not just gland straight into the CU? I must be missing something!

 

[shocking_eg]

I never understand why people gland into a metal apatable box at the side of a metal CU? Why not just gland straight into the CU? I must be missing something!

Think there on about a plastic CU

 

[rmc86uk]

No he says this

I suggested (if the fuse board is metal clad) terminating the armoured into a metal adaptable box inside the garage, using the metal box as a through box.

Also even if it was a plastic CU still no reason not to gland straight into it.

 

[shocking_eg]

No he says this



Also even if it was a plastic CU still no reason not to gland straight into it.

Hmmm I see...

I often use a metal adaptable box if terminating into a plastic CU as most CU's are so flimsy these days and they don't take kindly to a 25mm SWA hanging off the enclosure !

 

[Knobhead]

I always thought it was ok to earth one end of armouring till a college lecturer once told me both ends should be earthed in case of difference in potential occurred between the armouring at the unearthed end and the interval cpc.

Was this in the pub or at collage?

 

[atm84]

Sorry guys yes the fuse board in the garage is plastic.

Tony- what was at the pub or college (or collage as you say, I assume you mean college)

If you mean the part about earthing at one end. Yes I have been informed by many people including an earlier post here that's its acceptable to earth only at one end. Secondly it was a college lecturer that told me it should be earthed at both ends. If you insist on knowing more details just in case I have not convinced you enough yet it was during the 2391-20 design, erection and verification course in Rotheram with Connaught electrical when they were around. Think the lecturer was called Dave and we had ham sandwiches for lunch. No beer was allowed so it certainly wasn't in the pub. Convinced now?

 

[telectrix]

Sorry guys yes the fuse board in the garage is plastic.

Tony- what was at the pub or college (or collage as you say, I assume you mean college)

If you mean the part about earthing at one end. Yes I have been informed by many people including an earlier post here that's its acceptable to earth only at one end. Secondly it was a college lecturer that told me it should be earthed at both ends. If you insist on knowing more details just in case I have not convinced you enough yet it was during the 2391-20 design, erection and verification course in Rotheram with Connaught electrical when they were around. Think the lecturer was called Dave and we had ham sandwiches for lunch. No beer was allowed so it certainly wasn't in the pub. Convinced now?[/QUOTE

the armour of the SWA must be earthed. if it is not used as a cpc, then it only needs earthing at 1 end. if used as a cpc, then both ends need to be earthed. hope that clarifies it.

 

[Knobhead]

My doubts come from “a colleague” and “I’m not doing the job”, the by lines of many a DIYer.

Why aren’t you doing the job?

 

[atm84]

The reason why i am not doing the work Tony is because I'm not Part P registered also I no longer work in installation work, after being on the tools for 10 years. However I still like to have an understanding of the game though.

 

[clematis432]

The reason why i am not doing the work Tony is because I'm not Part P registered also I no longer work in installation work, after being on the tools for 10 years. However I still like to have an understanding of the game though.

Agree with your sentiments ! I am also no longer working but enjoy the forum and the interest of current electrical theory. Most on this forum appreciate this but several diehards on it don,t. Afraid to say not, Tony is one of the worst offenders.

 

[richy3333]

I never understand why people gland into a metal apatable box at the side of a metal CU? Why not just gland straight into the CU? I must be missing something!

ripping off the customer for an extra £100?

 

[micknew]

If he thinks he's missing something he must be a DIYer fishing to see what is required, because no sparks would do that.

 

[DaveyD]

separately metered in the garage.


Then live and neutral into the meter then out of the meter into the new fuse board.

You may have missed this bit of info?

 

[atm84]

What you getting at Davey D? I don't follow?