Firstly i must point out that the generators i am talking about are for temporary events and not permantly fixed..

I take your point Paul but as you are probably aware 99% of generators have RCD protection, surley an earth fault would take this out anyway,,

As far as i was aware most gennys are earth and neutral bonded at source. Surley that is the case??

The problem is that in theory if you take hold of the live from a genny, and the genny is not grounded you wont get a belt..

What i find hard to understand is that if the earth failed on the genny, and you were left with just an earth rod, (ignoring the RCD for a moment) a live/earth fault occured well nothing would happen, effectively all you would do would be make the earth rod live.

Is this correct??

If thats so i dont see the point of earthing the genny to the general mass of earth,

as you are proberaly aware there are no guide line on this in the regs book..