Clarification on gas bonding please

[Pete999]

If you get a copy of the Viper gas book it states that bonding must be looped

Please elaborate on your statement

 

[pc1966]

Regulation 411.3.1.2 requires main protective bonding if applicable to each separate installation, individual flats are considered separate electrical installations

This was my original point but put much more precisely.

While you might look at the building as a whole and argue that centrally maintained bonding is sufficient, each flat is a separate installation (with own CU and access/ownership differences).

Even if it were one building as an installation you would be looking at supplementary bonding for "exposed conductive parts" in each areas not totally covered by RCD protection, so basically the same thing (but subtle differences in bond size I guess).
[automerge]1588238041[/automerge]

How was this plumber killed, by touching two pipes? Was there a fault in the electrical installatio?

Probably back to the PME fault debate once more!

Avoiding gas mains being earthing means was mentioned in one of the IET articles (Wiring Matters 61, Summer 2016) just search for:
"Insulation inserts in metallic gas service pipes to consumers’ premises"

 

[davesparks]

If you get a copy of the Viper gas book it states that bonding must be looped

That appears to be a plumbing text book, not exactly a reliable source of information on the wiring regulations.

If you get a copy of D. W. Cockburn's book on earthing and bonding you will find all sorts of incorrect information about the subject.

Just because something is published in a book which claims to be correct it does not mean it is necessarily correct.