Cross bonding old gas pipe

[techypaul]

I have an old gas pipe that is still sitting next to a new gas pipe. My last plumber showed me that the main bonding was attached to the old pipe and not the new one. I have now switched the bonding over.

The old pipe goes off under the house in a different direction and I don't know where. Should I cross bond the old and new pipes with 4mm2 to be safe, in case that pipe is being used for bonding somewhere else, or is that not likely?

Paul.

 

[EFLImpudence]

Yes, just link the two.

You should use 10mm² for main bonding.

 

[techypaul]

Great, thanks for the guidance. 10mm2 is already in use for the main bonding now, so I'll bond to the old one and move on

 

[ebee]

Short answer (there are caveats) is main bond it in 10.00mm