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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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    I cannot see any problem with unplugging the fridge and plugging it into an extension lead - whether the lead is going to the neighbour or the shed at the bottom of the garden is irrelevant.

    More problematic might be something with bonding, such as a CH boiler.

    What you definitely don't want is the possibility of connecting the two installations' lines together - they are likely to be on different phases.

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  • 0

    I cannot see any problem with unplugging the fridge and plugging it into an extension lead - whether the lead is going to the neighbour or the shed at the bottom of the garden is irrelevant.

    More problematic might be something with bonding, such as a CH boiler.

    What you definitely don't want is the possibility of connecting the two installations' lines together - they are likely to be on different phases.

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