In article o9zpi.38980$Fc.28951@attbi_s21, "David Merrill" wrote:
Attempting to connect two #14 ground wires to a single ground screw in
single-tube Lithonia fluoresecent fixtures joined end-to-end resulted in
stripping the screw threads in the sheet steel fixture. Is it acceptable to
substitute the next larger size of self-tapping machine screw. Of course it
won't be green and will be cadmium or zinc plated.

Next size up is acceptable. It doesn't have to be green.

However -- the unacceptable part here is trying to put two wires under one
screw. Code prohibits connecting multiple wires to a single terminal unless
the terminal is specifically approved for multiple wires -- and you just
discovered one of the reasons why.

So for this one, and to avoid similar problems on other fixtures in the
future, loop a short (6" or so) pigtail around the grounding screw, and
wire-nut it to the two #14 ground wires.

--
Regards,
Doug Miller (alphageek at milmac dot com)

It's time to throw all their damned tea in the harbor again.