Eicr question

[RISElectrical]

Block of flats, 3 phase incomer split to feed 3 flats, PME coming in with a 16mm earth. This then feeds a 60a switched fuse that feed the flat. The cpc leaves the switch fuse as 6mm and then clamps to the armouring of a 10mm 2 core swa that goes up 2 floors to the flat db. At the flat db 4 strands of the armouring are then used for the cpc.

I have 2 questions that I'm unsure of. 1. What size would you record on the eicr for the earthing and 2. What would you code the 4 strands of armouring being used at the db? C2?

Any thoughts?

Thanks

 

[cjp1]

IMO not sure what to say for Undersized earth but would defo code it C2.

 

[R4BOE]

my opinion

C2 and C2 to both

is the arnouring being used as the main bonding contctor to the incoming services within the flat ?

 

[RISElectrical]

Yeah, 6mm to services from consumer unit

 

[R4BOE]

i would also mention this on the EICR as the main bonding should be assessed on the incomming neutral size