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What code would you give for a Swa supply 3p/N,95mm.
Supplies remote school block,2 storey,no main earth conductor,using sheath,the main earth bonding originates from this Swa,for this block,@ Main Panel board,& is 16 mm
The main earth @ origin is 120mm,Main bonding 50mm.
Cheers
 
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Ian1981

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What code would you give for a Swa supply 3p/N,95mm.
Supplies remote school block,2 storey,no main earth conductor,using sheath,the main earth bonding originates from this Swa,for this block,@ Main Panel board,& is 16 mm
The main earth @ origin is 120mm,Main bonding 50mm.
Cheers
What do you mean no main earth conductor?
You’ve just stated earthing conductor is 120mm
Using the armour for a cpc is acceptable if sized correctly.
What is the earthing arrangement?
Using the armour as a combined cpc/bonding conductor could be acceptable if say it’s TNS
 
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  • #3
Swa ,sheath used for main earth,the 120 mm Earth is at the origin intake of the school,this Swa is a sub main,to a remote block.
Tncs is the earthing system,185 mm Tails,120 mm Main Earth,50 mm earth bond.
 
Sheath is not the main earth, it is a cpc. I assume you are doing an EICR so you should know how to Code. What is your opinion.
 
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  • #5
Correct a cpc,my opinion is a code 2.
A main earth should have been installed with this Swa,to provide an adequate earth,& Main earth bonding.
 

Ian1981

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Correct a cpc,my opinion is a code 2.
A main earth should have been installed with this Swa,to provide an adequate earth,& Main earth bonding.
Your opinion is flawed unless inspection and testing revel otherwise.
Have you carried out the appropriate inspection and testing to verify that the current set up is potentially dangerous?

Again it’s a CPC not a MAIN earth

What is the earth arrangement?
Does the distribution circuit have adequate fault protection by ADS for its respective ocpd?
 
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  • #8
Yea it’s a cpc the Swa is being used for Main Earth @ the Main Panel in the block.
It’s also being used for the Main earth bonding conductor.
The situation is not potentially dangerous,what are you going on about my opinion is flawed,
The earthing is Pme Tncs.
 

Ian1981

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Yea it’s a cpc the Swa is being used for Main Earth @ the Main Panel in the block.
It’s also being used for the Main earth bonding conductor.
The situation is not potentially dangerous,what are you going on about my opinion is flawed,
The earthing is Pme Tncs.
I mean you can’t go on opinion, only by proof that it is potentially dangerous
 
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  • #11
Ok,it’s been in place since early 70’s,so no it’s not potentially dangerous.
The nitty gritty here is,the sub main to the block.
My opinion is it’s not correctly installed.
The cpc would be ok in protecting the Swa,but not ok to support Main earth bonding.
Code 2
 

Ian1981

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Ok,it’s been in place since early 70’s,so no it’s not potentially dangerous.
The nitty gritty here is,the sub main to the block.
My opinion is it’s not correctly installed.
The cpc would be ok in protecting the Swa,but not ok to support Main earth bonding.
Code 2
But if you believe it’s not potentially dangerous how can you then code 2 it?
 
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  • #13
It’s also a Distribution circuit,thinking a main earth should be present,sized accordingly.
 
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