How do I tell if my bathroom has supplementary bonding?

[sokorsognarf]

Hello. Non-electrician here. Failed an EICR yesterday as the electrician graded my consumer unit C2.

Why C2 and not C3? He didn't say (and still won't). Consumer unit is the same age as the building - dates from 2003. No RCD. But never had any issues. No apparent defects.

Apparently lack of RCD would be a C2 issue in combination with certain conditions. But property is a third-floor flat. No electric shower.

The one thing I'm not sure of is supplementary bonding in the bathrooms. How can a layman like myself tell whether it exists?

Or is it simply the case that a new-build from 2003 without RCD would definitely have supplementary bonding, as it wouldn't be possible to have neither?

 

[sokorsognarf]

A smallish flat, thoroughly (properly), probably 2-3 hours

Oh! Crikey. OK, well - I'm in the process of emailing them about it - so that is certainly useful to know. Thanks

 

[suffolkspark]

Oh! Crikey. OK, well - I'm in the process of emailing them about it - so that is certainly useful to know. Thanks

The report should be around 6 A4 pages

 

[pc1966]

There is useful guidance for free in the form of Best Practice Guide #4 that can be downloaded from here:

Best Practice Guides | Electrical Safety First

Electrical Safety First produces, in association with other industry bodies, a range of Best Practice Guides which provide definitive information and guidance on a range of technical subjects.

www.electricalsafetyfirst.org.uk

While it is still moderately technical, it has a bit more information about the goals of an EICR and what the code levels would typically apply to. It is guidance though, as you can't cover every possible situation and you can find a given non-compliance can cause varying degrees of risk depending on other aspects of the installation and the inspector often has to use their judgment on those cases. But it is a good starting point.