New boiler earth cross bonding

[bikerbas]

Sparky mate of mine says if the house as new 17th edition consumer units you dont have to cross bond pipe work,is this right?he says easys way to tell if the unit has a yellow test button on it.

 

[Billy Bob Bob]

he is right if the house is wired to and protected to the new 17 th edition you dont need cross bonding on the pipe work dont know about the yellow button