Re: polarity of voltage regulator
"Eddy Bayton" <firstname.lastname@example.org> wrote in message
> "JD" <jjd@SPAMLESS.com.au> wrote in message
> > Eddy Bayton wrote:
> > > I need a good sparky to advise.
> > >
> > > Does the vehicle polarity (my dynamo based 2a is +ve earth) matter
> > > fitting a voltage regulator? These items are a closed book to me i'm
> > > afraid. Electrical things beyond where the wires go onto the spade
> > > connectors all are. Any advice?
> > >
> > > cheers
> > >
> > > Eddy
> > No. Assuming you are talking about the original electromechanical type
> > regulator. These will work on either polarity.
> > JD
> Thanks, thats the fella, black box with clip off lid and electromagnetic
> contacts you have to keep clean and check the gap on every decade or so.
> a lot of spade connectors on it for tangling your wires.
> Seriously though, it was a genuine question. The device seems identical to
> the ones I had on Austin, Morris, MG and Triumph cars in the 1970s. All
> their polarities were -ve though and I'd never encountered a +ve earth
> except old Beetles before. Is the part number the same throughout Series 2
> and 2a until the alternator was introduced?
Lucas number RB108 but if you clean the points it needs to be reset with a
multimeter, checking the gap won't do!
If you want to change the polarity, to fit a radio for instance, very easy
to do but an alternator would be better and providing you've got the
mounting bracket, also very easy to do.