The black and white leads are connected to the fixtures and the voltmeter
shows 110vac on them. The ground wire is attached to the fixture also and a
voltmeter shows 0v between the fixture and a good remote ground (plumbing)
when the power is applied.

The ground is a safety feature but don't see how it could prevent the lamps
from lighting even if the ground was defective. What is your thinking on
how a bad ground could cause the problem?


"Joseph Meehan" wrote in message
...
Blue wrote:
I have two adjacent flourescent fixtures of two 40W bulbs each. Both
fixtures (all four lamps) went out at once. The fixtures are both
getting
120v and there is a slight humming noise from one (or both?) of the
ballasts.

Well, I can understand one of the ballasts going out but not both at
once.

I'd put my money on a bad ground. Also consider that it may be getting
colder and it may be below their operating temperature.

--
Joseph E. Meehan

26 + 6 = 1 It's Irish Math