Bonding tray, basket

[i=p/u]

Job I'm on at moment they using basket, tray and trunking... They using a bit of every thing throughout a cable runs ie jumping from tray to basket then into trunking. None of it actually joining do the have to bond the containment even tho not joined. Cable type used is yy.

 

[Engineer54]

GN 8 pg157 section 10.11 - No, not required but check requirements of 412.2.4.1, 543.2.2 & 411.3.1.2

Great if you have these references to hand, but useless to those that haven't!! So spell it out in plain English as to what you're saying please??

 

[old_sparky_RE]

Reference numbers are from the BGB.
412.2.4.1 Does the cable have a non-conductive sheath then it's ok.......generally, the conductive parts of a metal cable tray or basket need not be earthed. Some conductive parts of a metal cable support system may be earthed, however by virtue of fortutious contact with exposed-conductive-parts.
543.2.2 if your using the tray as an earth path then it needs to be connected to earth.
411.3.1.2 If the tray can introduce a potential from outside the location then bond to earth.

 

[Engineer54]

Reference numbers are from the BGB.
412.2.4.1 Does the cable have a non-conductive sheath then it's ok.......generally, the conductive parts of a metal cable tray or basket need not be earthed. Some conductive parts of a metal cable support system may be earthed, however by virtue of fortutious contact with exposed-conductive-parts.
543.2.2 if your using the tray as an earth path then it needs to be connected to earth.
411.3.1.2 If the tray can introduce a potential from outside the location then bond to earth.

Just goes to show how even the regulation standards have dropped over the years!!

I would'nt even dream of leaving a metal containmeent system that's carring LV or MV cables unearthed, and never have....

 

[Guest55]

continuous!!

^^^ This !!!

a sign of of a quality install is all metal containment with no jumps / gaps / breaks !
which also has the added benefit of not needing to fit millions of individual earth tags and provides a much superior cpc if needed.

should look like something i knocked up on my last big project.............

 

[i=p/u]

Isit not just a 4mm needed . How would you determine size super buff

 

[telectrix]

^^^ This !!!

a sign of of a quality install is all metal containment with no jumps / gaps / breaks !
which also has the added benefit of not needing to fit millions of individual earth tags and provides a much superior cpc if needed.

should look like something i knocked up on my last big project.............

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neat....

 

[pepparz]

^^^ This !!!

a sign of of a quality install is all metal containment with no jumps / gaps / breaks !
which also has the added benefit of not needing to fit millions of individual earth tags and provides a much superior cpc if needed.

should look like something i knocked up on my last big project.............

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i hope your not leaving it like that!

 

[Guest55]

i hope your not leaving it like that!

1. they were pics taken during the job.
2. the tray shown is continous throughout and required no additional earthing links.

i'm sure you can provide photos showcasing your own superior work for the enjoyment of the forum.

 

[pepparz]

id add a few more tyraps it looks like temp cables

 

[pepparz]

cables tied to fixed ladder-come on!

- - - Updated - - -

is the ladder earthed?

 

[pepparz]

and whats with the extra long unistrut brackets

 

[snowhead]

cables tied to fixed ladder-come on!

- - - Updated - - -

is the ladder earthed?

It's the lightning conductor form the church spire??

 

[Guest55]

cables tied to fixed ladder-come on!

- - - Updated - - -

is the ladder earthed?

there is no ladder , its all tray.
all exposed metalwork is earthed.

you still havent posted pics of your own work to show us all how its done instead you obviously prefer to hide behind a few pathetic critisizing posts.
come back when you can bring something of substance to the table.
needs more tie wraps ? lol is that all youve got ?

 

[ackbarthestar]

You'd have to completely bonkers not to earth bond the metal containment, particularly trunking and tray. Its easy to trap a live conductor between the lid and base or worst still the weight of the cables pushing down on the edge of a piece of tray.

 

[pepparz]

there is no ladder , its all tray.
all exposed metalwork is earthed.

you still havent posted pics of your own work to show us all how its done instead you obviously prefer to hide behind a few pathetic critisizing posts.
come back when you can bring something of substance to the table.
needs more tie wraps ? lol is that all youve got ?

im not talking about ladder racking, its the personel access ladder with the cage around it,youve get cable attached to it. bad parctice!