Thread
:
Fluorescent amperage
View Single Post
#
5
Posted to alt.home.repair
Terry
external usenet poster
Posts: 663
Fluorescent amperage
On Sat, 07 Oct 2006 19:59:33 GMT,
(Beachcomber)
wrote:
How much current is drained by a 2x 40 watt T12 magnetic ballasted
shop light trough at peak current draw? I assume this is at startup,
while trying to saturate the transformer and ignite the tubes. How
much
is drawn once the lights are running?
Short version: How many such fixtures (too cheap to replace
the old ones) can be run on a 15 amp circuit?
I have an old textbook that says to allow 20% of the total lamp
wattage rating for power to the ballast. That would mean 1.20 x 2 x
40 watts = 96 watts total power consumed (not appartent power) for a
simple dual-40 fixture.
Maybe the new electronic ballasts are more efficient than this?
Beachcomber
That is lamp wattage. Not the ballast.
Reply With Quote
Terry
View Public Profile
Find all posts by Terry