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Old 09-09-2012, 08:59 AM   #11
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Join Date: Aug 2011
Location: Albany, GA.
Posts: 913
Vaseline is not (technically) a dielectric material, dielectric grease/lube is. Meaning: Under certain conditions Vaseline will conduct electricity, especially static electricity. Using Vaseline on the base of light bulbs will create a condition in as much as the terminals would technically short out. You may only notice that the lamp is not as bright as it should be, or flickering. On household fixtures using 110/120 vAC where Vaseline was used on the base of the lamps there could be/probably will be an odor once the Vaseline warms up with the lamp base. This will also, somewhat, liquify the Vaseline which allows it to become even more conductive which effectively creates a short, which creates high heat, which could lead to a fire. This was taught to me during fire science training years ago.

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