277 volt incandescent

[electricalperson]

I don't think there are too many mines on Cape Cod.

i was just wondering so i can look to see what they require. ill probably never work in a mine im just curious

 

[alfiesauce]

I've replaced 120V lamps with 240V lamps before. Makes for a really long lasting lamp - albeit - dimmer.

 

[Fulthrotl]

if i needed a bulb above a fire extinguisher or above the master box outside or whatever id just use 120. what happens when the janitor replaces the burned out lamp with a 120 volt one?

it may not be that you need a 277 volt lamp over a fire extinguisher....
perhaps you need a fire extinguisher under every 277 volt lamp?

 

[Greg Swartz]

It burns out.

But it does burn quite brightly for a few seconds...

(Not that I have any experience doing this... )

 

[Greg Swartz]

it may not be that you need a 277 volt lamp over a fire extinguisher....
perhaps you need a fire extinguisher under every 277 volt lamp?

OUCH! That'd be an expensive change order!

 

[boboelectric]

we would mess around with 277 and 480 in high school. we had 277 volt lamps up high that we would control with different switches and all that good stuff. i never used a 277 volt incandecant in the real world though. if i needed a bulb above a fire extinguisher or above the master box outside or whatever id just use 120. what happens when the janitor replaces the burned out lamp with a 120 volt one?

The Electricians file a grievence

 

[jrannis]

I was called out to a Kmart where the handy manager connected a chandelier to a 277 volt lighting circuit. The lamps were bright for sure but would only last a day or so. They had plenty of bulbs on hand so it wasn't that much of an issue for them.
I took him aside and let him know what was going on with it. Got my ticket signed. Everybody was happy.

Any of you guys ever tried these:
http://www.acehardwaresuperstore.com/the-button-light-bulb-saver-p-22432.html?ref=42

 

[LarryFine]

Any of you guys ever tried these:
http://www.acehardwaresuperstore.com/the-button-light-bulb-saver-p-22432.html?ref=42

You can do that with a simple diode in series with the load. It also reduces the brightness quite a bit.

I did that years ago, when my son was small. I put a diode across the hall-bath switch to change it from an on-off switch to a high/low switch.