Might be worth checking in to:
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Shop Lights in Houston - Craigslist
Nov 06, 2012
11 Replies
277volts? not 220, or 120..
Is 3 phase 277v?
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> Sonny
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480Y/277V,3PH, 4 Wire is a very common industrial distribution scheme.3, 277V single phase legs are connected in a grounded neutral Y configuration to produce 480V, 3 Ph power (L1, L2, L3).
1 PH power (L1 or L2 or L3 to N (grounded neutral) produces 277V for single phase loads is available from the addition of the neutral conductor.It's just that old square root of 3 thing.
BTW, 208Y/120 is another popular distribution scheme.
Lew
good deal.
Lew
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>SonnyNot a good deal unless you happen to be sitting on a 120 to 277V transformer. And if they don't have electronic ballasts your paying the seller to dispose of them for him.
Mike M
What a deal. Now just to rewire the home shop to use 277 V. :)
I'm not knowledgeable enough to have known this wasn't a reasonable deal for the average shop. Thanks.
Sonny
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> Sonny
regardless of ballast or voltage, the tubes for these are not going to be available soon. That's why they are being taken out of buildings everywhere.
I think they are Maryhoowanna grow-lights.
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Why would 4 foot T8 tubes not be available?
That's wierd our gym in our school just replaced the vapor lights with T8.. I'm sure the school is 3phase.
Nice because they are > >> Might be worth checking in to:
I'm assuming he thought they were T-12 fixtures which are being phased out. Lighting technology has been changing rapidly and it can be practical to replace T-8 3/L fixtures as well. I haven't worked since
2009 but there are a lot of programs making it attractive and give a fast payback. They were just getting started with LED back when I got hurt.Mike M
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