Does our electrical supply need earthing?

John Conlin / 27 October 2016

Have you been told your electrical supply may not be earthed? Our chartered surveyor John Conlin explains.


We have just had a water meter fitted and the leaflet from the water company warns that ‘earthing’ on our electrical supply may no longer be effective. 

Why is this and what should we do?


Sometimes, particularly if your electric supply is via overhead cables, the incoming main water pipe was used as an earth connection.

New water meters and modern underground water pipes are plastic which is non-conductive and can block or reduce the capacity of the earth connection.

Ask an electrician to check your earth capacity and fit an independent earth rod if necessary.

For more tips from John Conlin visit the
Chartered Surveyor Q&A section

The opinions expressed are those of the author and are not held by Saga unless specifically stated.

The material is for general information only and does not constitute investment, tax, legal, medical or other form of advice. You should not rely on this information to make (or refrain from making) any decisions. Always obtain independent, professional advice for your own particular situation.