Light Fixtures 240V fixtures on 208V circuit?
Light Fixtures 240V fixtures on 208V circuit?
(OP)
Hello all
I've got a 208V power source single-phase. Turns out the light fixtures I have are 240V. Any harm in powering the 240V light fixtures from a 208V power source?
Let me know if I can clarify anything.
I've got a 208V power source single-phase. Turns out the light fixtures I have are 240V. Any harm in powering the 240V light fixtures from a 208V power source?
Let me know if I can clarify anything.
http://politicalplangetis.blogspot.com/
Free-market politics and money-making stocks.






RE: Light Fixtures 240V fixtures on 208V circuit?
RE: Light Fixtures 240V fixtures on 208V circuit?
RE: Light Fixtures 240V fixtures on 208V circuit?
RE: Light Fixtures 240V fixtures on 208V circuit?
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Light Fixtures 240V fixtures on 208V circuit?
Many HID ballasts are equipped with multiple taps to allow for operation at 120V, 208V, 240V, 277V, or 480V. Verify that this is not the case before doing anything else. Otherwise, the ballasts will need to be replaced. Buck-boost transformers are another option, as well.
RE: Light Fixtures 240V fixtures on 208V circuit?
What we are more than likely going to have to do is change the entire assembly to 208V...per the recommendation of the manufacturer of the lights. Adding transformers I'm being told is going to be more expensive than just changing the entire assembly.
http://politicalplangetis.blogspot.com/
Free-market politics and money-making stocks.
RE: Light Fixtures 240V fixtures on 208V circuit?
Do you want to consider the equivalent lux output due to a lower nominal voltage applied and see whether it is still complying with your requirement before to paddle to an endeavor to change all of them?
RE: Light Fixtures 240V fixtures on 208V circuit?
I'd replace them with 208V fixtures. The problems you might encounter with using 240V marked equipment improperly include visibility and/or flashing rate out of spec. The biggest risk is that some doctor will fly his Cessna into your silo and, following the subsequent investigation, his heirs will sue you, the silo owner and anyone else they can find for his death.
RE: Light Fixtures 240V fixtures on 208V circuit?
It may have been designed that way. You get longer bulb life with 208 volts. I have seen it on stack lighting.
RE: Light Fixtures 240V fixtures on 208V circuit?
That would be insane for one goverment agency to recommend, and another to outlaw.
RE: Light Fixtures 240V fixtures on 208V circuit?
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Light Fixtures 240V fixtures on 208V circuit?
RE: Light Fixtures 240V fixtures on 208V circuit?
I had a project years ago where we had dozens of 120V indicator bulbs on a series of control panels. The distribution transformer was tapped up to help the starting of 480V motors. The result was that our tiny 120V bulbs were burning out at a disappointing rate. We put in a transformer with an 88V secondary, and we never had another problem.
RE: Light Fixtures 240V fixtures on 208V circuit?
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Light Fixtures 240V fixtures on 208V circuit?
For the comment regarding the life expectancy of a bulb based on voltage: where would Ifind this in the NEC?
http://politicalplangetis.blogspot.com/
Free-market politics and money-making stocks.
RE: Light Fixtures 240V fixtures on 208V circuit?
RE: Light Fixtures 240V fixtures on 208V circuit?
I have a fixture (with bulbs) that I brought back from Paris rated at 220V. Just for kicks, I put it in a hallway in my house about 20 years ago. The light is dim (but good enough for the hallway) and the bulbs have never been replaced.