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1 members (Scott35),
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Key:
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Joined: Sep 2001
Posts: 8
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This is probably a simple question for this group. A co-worker recently had a residence rewired and has experienced the light bulbs in one hallway burning out every couple of weeks. Any thoughts on what is causing this?
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Joined: May 2001
Posts: 717
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Loose neutral (in home run, splice, etc.) poorly made edison base sockets for the bulbs, poorly made, maybe imported light bulbs.
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Joined: Oct 2000
Posts: 4,138 Likes: 4
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Bulbs could be loose or subject to vibration somehow from the floor above, slamming doors, etc. Try a rough service bulb in the fixture.
Bill
Bill
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Joined: Jan 2002
Posts: 36
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As the others said. Most likely a loose neutral somewhere, obviously try looking at the fixture first. Last resort, try a 130v incandescent lamp. Covers many a problem.
Cheers
NS4M
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Joined: Aug 2001
Posts: 335
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NS4M has the right idea. There is a formula for incandescent bulbs in our apprenticeship books that says:
(Actual Life/Rated Life) = (Rated Volts/Actual Volts)^13.
Take a 130 volt, 1000hr rated bulb and feed it 123 volts and you get:
AL/1000=(130/123)^13 or 2053 hours actual life.
In contrast, take a 120 volt 1000hr bulb and feed it 123 volts and you get:
AL/1000=(120/123)^13 or 725 hours actual life.
Those 130v bulbs are life savers in hard to reach fixtures.
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Posts: 7,400
Joined: April 2002
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