just thought i would point out that you would not "earth" radiators anyway, because they are not part of the electrical installation. You MIGHT bond them, but that is a different thing. Also, it is not a case of "electricians" going around having to "guess" at things, there are reasons why things are bonded, and in case of uncertainty, there are very well known tests as to whether they require bonding anyway.
Bonding everything in sight [regardless as to whether it needs to be bonded] is increasing the risk of someone having a shock in the first place.
john..
Bonding everything in sight [regardless as to whether it needs to be bonded] is increasing the risk of someone having a shock in the first place.
john..