[SEL] Semi OT - Trailer question

[Dave Rotigel]

>"Insulated earth return" is used almost exclusively on road tankers
>over here, although there is a slow movement towards wider acceptance
>on trucks generally.
>We run an earth conductor separately, most 7-core trailer wire has a
>larger earth core than the rest, but otherwise the standard one has to
>do.
>Peter

Damn Peter, You have no idea how glad I am to know what you do in the UK!
         Dave