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Mystery part! Answered

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My sister brought me home this part tonight from tech crew at school, she says she thinks it came from a fire alarm but were not sure. There are 2 lightbulb sockets and engraved on the metal it says "75W -125 v". Out of the back there are 6 wires, 1 red 1 black 2 white that are going into the large thing in the middle, and 1 black and 1 white coming out of the empty socket. the 2 sockets are also wired together. What is this part? is it simply a power supply with 2 light bulbs? The label says "Lithonia emergency systems on it" "input : 277 at 60hz (wht and black) output:120v 21.6VA (wht and red).

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killerjackalope (author)2008-02-28

Some sort of transformer? Maybe a bell ringing device. try powering it up if you're the daring type... Would suggest lots of safety measures if you do though.

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user

a variac/ isolation transformer is a good precaution

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user

Indeed as is a faraday cage...

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astrozombies138 (author)2008-02-29

so, solder in a plug to the white and black coming out the end and i have a lamp?

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Goodhart (author)2008-02-28

because of the "odd ball" voltage rating (277) I would guess it is made for an office / business environment (our florescent lights are like this).
Note: Lithonia emergency systems

And also this link here...

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NachoMahma (author)Goodhart2008-02-29

. 277VAC is one leg of Wye-connected/3-phase/480VAC to ground. Pretty dang common.

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NachoMahma (author)NachoMahma2008-02-29

. PS: which leads me to believe this unit came from an industrial setting.

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Goodhart (author)NachoMahma2008-02-29

Yeah, that is what I was attempting to convey (not very well I see :-)

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NachoMahma (author)Goodhart2008-02-29

. Well, most ppl that know me will tell you that I miss the obvious quite often. :) . In a DIY setting, such as here, I guess it's fair to call 277 odd-ball, but for emergency lighting, it's very common.

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Goodhart (author)NachoMahma2008-02-29

I know the feeling about missing the obvious (sometimes I come up with the most convoluted way to solve a problem, and someone else will say, "Why don't you just unplug it overnight?" Um, duh, yeah LOL

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Goodhart (author)NachoMahma2008-02-29

Yeah, I remember when they redid our building (where I work) and tore out all the fluorescents, emergency backup lighting, and exit signs, and I asked about them, they said I would not be able to use them at home, for this reason.

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NachoMahma (author)2008-02-29

. It's an exit sign. The orange connector (black & red wires) goes to a battery/charger.

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Goodhart (author)NachoMahma2008-02-29

That's what I thought too.

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tech-king (author)NachoMahma2008-02-29
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LinuxH4x0r (author)2008-02-28

I think its just from those illuminated exit signs. Its just a 220 to 120 transformer.

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Goodhart (author)LinuxH4x0r2008-02-28

If it is in the USA, it is more likely an odd voltage rating as they do this to deter theft.

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