At 01:58 PM 7/16/01 -0400, you wrote:
>What does the loose neutral do to make the bulb burn out faster?

Normal wiring in US and Canadian residences looks like this..

120VAC
o-------x    <----------x
        |               |
   [100W bulb]          |
N       |               |
o--//---x              240VAC
        |               |
    [500W load]         |
        |               |
o-------x    <----------x
120VAC


See what happens to the 100W bulb if the neutral connection is flakey?

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