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Hi Guys just a quick question but what the hell do I put in confirmation of earthing conductor size when the earth is the swa
Refer to the Table Buzz has provided
 
I've already checked the table but it's not the csa I'm after which option on ecr do I put pass/na/nv etc
refer to the chart it will give the size equiv to CU
 
I'm filling out an EICR on a landlord supply there is a small consumer unit fed by 25mm 2 cire swa from an isolator which is fed from 25mm tails from a meter with a 16mm earth my question is how can I confirm the conductor size to the consumer unit when it is swa
 
If your earthing system is TN-C-S then the armour is inadequate to support main protective bonding.
 
Use table 54.7 of bs7671.
Or the Adiabatic equation for CSA of armouring for use as the cpc
 

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