EICR Certificate - Should Bathroom light not having RCD protection be C2 or C3?

Thank you all for your comments and advice, it’s very much appreciated.

The link to the Best Practice Guide provided by OlympusMons was particularly useful as it provided some clarification on the C2 that is written on my EICR.  The following is the wording on my EICR, it is rather long and I was struggling to understand it.

“Absence of supplementary bonding where required in a location containing a bath or shower, where all final circuits of the location comply with the requirements of Regulation 411.3.2 for automatic disconnection, and all final circuits have additional protection by means of a 30mA RCD, and all extraneous-conductive-parts of the location are effectively connected to the protective equipotential bonding (main earthing terminal)”

Page 12 of the Best Practice Guide is more clearly written with wording similar to that above and seems to state that a C2 is appropriate IF there is an absence of supplementary bonding and there’s no RCD and a few other things.

Page 13 also clearly states C3 applies for “Absence of RCD protection for circuits of a location containing a bath or shower where satisfactory supplementary bonding is present”

As such, I believe I now need to establish if I have satisfactory supplementary bonding!

I don’t readily have access to the premises but I expect the simple light battenholder fixture will have the cpc terminated within it but I don’t remember seeing visible earth straps on the wash basin pipework or radiator and the pipework for the bath is hidden.  However, Page 12 states “Where the presence of supplementary bonding cannot be confirmed by inspection it may be verified by a continuity test (<0.05 Ω).  

I don’t know if the electrician has done the above continuity test but I’m thinking that if I measure the continuity between all taps, radiator and light fitting wrt the main earth then if less than 0.05 Ohm then I shouldn’t need an RCD hence C3.  If it’s more than 0.05 Ohm then I guess I’ll just bite the bullet and get the electrician to fit a new CU which will have 9 RCBOs for all the existing circuits and SPD (I’ve spent too many nights Googling all things EICR related and I’ve had enough).

Thanks again to all who have offered advice, it’s very much appreciated.

Thank you all for your comments and advice, it’s very much appreciated.

The link to the Best Practice Guide provided by OlympusMons was particularly useful as it provided some clarification on the C2 that is written on my EICR.  The following is the wording on my EICR, it is rather long and I was struggling to understand it.

“Absence of supplementary bonding where required in a location containing a bath or shower, where all final circuits of the location comply with the requirements of Regulation 411.3.2 for automatic disconnection, and all final circuits have additional protection by means of a 30mA RCD, and all extraneous-conductive-parts of the location are effectively connected to the protective equipotential bonding (main earthing terminal)”

Page 12 of the Best Practice Guide is more clearly written with wording similar to that above and seems to state that a C2 is appropriate IF there is an absence of supplementary bonding and there’s no RCD and a few other things.

Page 13 also clearly states C3 applies for “Absence of RCD protection for circuits of a location containing a bath or shower where satisfactory supplementary bonding is present”

As such, I believe I now need to establish if I have satisfactory supplementary bonding!

I don’t readily have access to the premises but I expect the simple light battenholder fixture will have the cpc terminated within it but I don’t remember seeing visible earth straps on the wash basin pipework or radiator and the pipework for the bath is hidden.  However, Page 12 states “Where the presence of supplementary bonding cannot be confirmed by inspection it may be verified by a continuity test (<0.05 Ω).  

I don’t know if the electrician has done the above continuity test but I’m thinking that if I measure the continuity between all taps, radiator and light fitting wrt the main earth then if less than 0.05 Ohm then I shouldn’t need an RCD hence C3.  If it’s more than 0.05 Ohm then I guess I’ll just bite the bullet and get the electrician to fit a new CU which will have 9 RCBOs for all the existing circuits and SPD (I’ve spent too many nights Googling all things EICR related and I’ve had enough).

Thanks again to all who have offered advice, it’s very much appreciated.