To the second point first, from Andy, Anyone confused by that shouldn't be doing the EICR Andy, but there we go.
All circuits in a TN mains installation would normally have a CPC run with them, but "with them" is not a requirement, just that one is present at every accessory and appliance etc. This could be structural steel connections, or SWA armour, or containment as long as the Zs is low enough at the point of load. This is of course what everyone measures during an EICR (or should...).
ELV cables don't necessarily have to have an Earth, in many cases it wouldn't do much good as any kind of Zs might well not be achievable, but it doesn't matter as they are not considered dangerous. There would be a value Andy, it might just be rather higher at the destination board than expected, and an R1+R2 would need a N/A and a note on the form.
To the second point first, from Andy, Anyone confused by that shouldn't be doing the EICR Andy, but there we go.
All circuits in a TN mains installation would normally have a CPC run with them, but "with them" is not a requirement, just that one is present at every accessory and appliance etc. This could be structural steel connections, or SWA armour, or containment as long as the Zs is low enough at the point of load. This is of course what everyone measures during an EICR (or should...).
ELV cables don't necessarily have to have an Earth, in many cases it wouldn't do much good as any kind of Zs might well not be achievable, but it doesn't matter as they are not considered dangerous. There would be a value Andy, it might just be rather higher at the destination board than expected, and an R1+R2 would need a N/A and a note on the form.
