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Connection to Neighbour

PG

A house has a 230V, 5kW standby generator which is connected to the electrical installation via a manual, double pole (L&N), break before make changeover switch. In accordance with DNO requirements, it has the neutral earthed by an electrode (in addition to the MET connection with earth).

The next-door neighbours do not have a standby generator and the question was raised that, in the event of a mains power loss, would it be OK to run an extension lead from the Standby Generator fed installation to supply, say, the neighbours fridge?

I sketched out the arrangement for both TN-S & TN-C-S and can’t see any problems. 

I note that where the neighbour’s equipment is connected to his/her dwelling equipotential bonding system (say a heating boiler supply) the two dwelling equipotential bonding systems would be interconnected by the extension lead earth core. This would be in addition to any parallel paths present (water, gas services etc.). 

Does anyone foresee any problems with the proposed arrangement of supplying the neighbour via an extension lead?

Many thanks.

PG

A picture is worth a thousand words ?

Generator next door.pdf

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  • 0

     

    The next-door neighbours do not have a standby generator and the question was raised that, in the event of a mains power loss, would it be OK to run an extension lead from the Standby Generator fed installation to supply, say, the neighbours fridge?

     

    I

    I installed the same changeover arrangement for a 3kW generator in my house, about 6 years ago. There is an RCD installed on the house DB for sockets. It would be possible to give a close neighbour an extension from a 13A socket on the house RFC, with a low rated fuse but “Close enough to be neighbours but too distant to be friends”. Most freezers will survive for 24 hours with no power though if not opened too much; mine has a thermometer on the outside of the door for the common fridge and one for the freezer. ?       

    Jaymack

Reply
  • 0

     

    The next-door neighbours do not have a standby generator and the question was raised that, in the event of a mains power loss, would it be OK to run an extension lead from the Standby Generator fed installation to supply, say, the neighbours fridge?

     

    I

    I installed the same changeover arrangement for a 3kW generator in my house, about 6 years ago. There is an RCD installed on the house DB for sockets. It would be possible to give a close neighbour an extension from a 13A socket on the house RFC, with a low rated fuse but “Close enough to be neighbours but too distant to be friends”. Most freezers will survive for 24 hours with no power though if not opened too much; mine has a thermometer on the outside of the door for the common fridge and one for the freezer. ?       

    Jaymack

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