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Generator earthing

Baldyhugh
Hi


I have a tractor driven Backup generator to install on a farm shortly and have a query regarding the earth spike. Does it need to go directly back to the MET or can I connect it directly into the generator earth terminal, the latter being Quite a lot simpler   In my case? 


thanks

Parents
  • 0
    Hi all and thanks for your replies


    The supply transformer only supplies this one property and was only installed last year During the upgrade to 200a and is definitely tn-s. some have mentioned a ‘private transformer’. I’m a bit confused by this, does it mean it is a dno transformer and only supplies one property Or it is privately owned and ran? Yes the generator is basically an alternator with a Pro shaft out of the end. It is bolted to the floor of a plant room and the pto shaft goes out through the wall. So there is no control panel on the gen itself. My changeover switch is incorporated into a larger switchboard which includes ct chamber and meter cubicle. Also incorporated in this is the over current protection for the generator and I intend to fit a selectable rcd aswell. I would have liked to have had these directly on the generator but that is not possible so there is about 10 meters of cable between the genset and the gen breaker/rcd in the switchboard. Any views on the original questIon of whether the earth cable from the spike can go directly onto the generator earth terminal or if it must go to the MET?
Reply
  • 0
    Hi all and thanks for your replies


    The supply transformer only supplies this one property and was only installed last year During the upgrade to 200a and is definitely tn-s. some have mentioned a ‘private transformer’. I’m a bit confused by this, does it mean it is a dno transformer and only supplies one property Or it is privately owned and ran? Yes the generator is basically an alternator with a Pro shaft out of the end. It is bolted to the floor of a plant room and the pto shaft goes out through the wall. So there is no control panel on the gen itself. My changeover switch is incorporated into a larger switchboard which includes ct chamber and meter cubicle. Also incorporated in this is the over current protection for the generator and I intend to fit a selectable rcd aswell. I would have liked to have had these directly on the generator but that is not possible so there is about 10 meters of cable between the genset and the gen breaker/rcd in the switchboard. Any views on the original questIon of whether the earth cable from the spike can go directly onto the generator earth terminal or if it must go to the MET?
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