Alberto Smulders wrote:

> Not one bulb, but two in series (because one will burn out
> immediately); the normal way is to use six bulbs,  two between
> corresponding phases of the two generators; when all bulbs are out,
> you can put the second generator on the distribution bars, because
> that way they are phase synchronized. Have done myself this way with
> two hydro-powered 50 kVA generators somewhere in Northern Argentina,
> in a small Andes-town...

  Of course.  Even if you use bulbs of a higher voltage, you want a bit
of leeway as if they burn out you could get the wrong idea.  Two bulbs
in series are also used to allow testing between phases (three-phase
system presumed).

  You didn't mention the reason of course for using the bulbs across all
three phases rather than just the first.

  Cheers,
        Paul B.