Re: T8 instant start reflector grounding.
- From: Victor Roberts <xxx@xxxxxxxxxxxxxxxxxxxxx>
- Date: Wed, 13 Jun 2007 23:26:49 -0400
On Wed, 13 Jun 2007 11:45:20 -0700, Chuck Haskell
<fatherhaskell@xxxxxxxxx> wrote:
2 electronic ballasts (Radionic EA217Z12-7, double F17T8) stripped
from
Lowes "Utilitech" double T8 fixtures, being used to build a 4-tube
plywood
aquarium hood. The lamps seemed to fire up fine so far without the
required grounded reflector (capacitance needed to ionize the gas, I
know) the first half dozen tries. How reliable will this be if I
don't ground
the reflector?
I know it's not hard, just a wire along the length of the tubes, but I
prefer
simple designs for the sake of fewer parts to fail, and more
important,
I'm lazy. Seemed like the tubes being within 1/2" of the ballasts
was
doing the trick.
Grounding the fixture insures that lamps will start under
worst case conditions: low temperature and low line voltage.
It may not be needed under normal conditions. Also, at high
frequency the coupling between the lamp and ballast may be
enough under many conditions, as you have found out.
Grounding should also not be necessary with instant start or
even many programmed rapid start ballasts.
--
Vic Roberts
http://www.RobertsResearchInc.com
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- References:
- T8 instant start reflector grounding.
- From: Chuck Haskell
- T8 instant start reflector grounding.
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