ECN Forum Forums General Topics of the Trade Non-US Electrical Systems & Trades More British peculiarities

Paul,
The term Multiple-Earthed Neutral system of supply, may help you.
The Neutral is terminated at the 'Star-Point'
of the Star side of the Delta-Star(11kV/400V),Berm Transformer, the Neutral is also earthed at various points along the lines, out of the secondary side of the X-former, just depends upon the length of Radial run, normally we like to earth the Neutral at every point possible, but this is also done at every consumers installation via the N-E Busbars.

Same principle as the British PME (Protective Multiple Earthing) where we have multiple earths along the run of the neutral.

So are you saying that the neutral-earth bond at the house is actually between the neutral & earth busbars in the panel?

Yes, exactly Paul, it is done to keep the line-earth loop resistance under control.

Sorry for any confusion -- I was just trying to establish beyond doubt the exact point in the installation at which you have neutral and earth bonded together.

In the U.K., the neutral and earth busbars in the distribution panel are kept strictly isolated. The N-E bond is made only at the incoming service block before the meter.