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Old 05-23-2009, 11:37 AM   #1
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Neighbor's AC dims my lights!


My lights dim slightly when my neighbor's rather large AC unit comes on. Should I be concerned about this?

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Old 05-23-2009, 12:23 PM   #2
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Neighbor's AC dims my lights!


I would complain to your local Power Company, that is to whoever bills you for Power. It is in your interest to keep the incoming line voltage as high as possible, that is ideally when there is a minimal voltage drop between the pole Transformer and your meter.

When there is a notable dip in your line voltage when the neighbor,s AC comes on then you may also have a not noticeable lower line voltage due to the neighbor's non-cyclical loads.

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Old 05-23-2009, 01:27 PM   #3
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Neighbor's AC dims my lights!


Yes, call your utility provider.

I'd also recommend you get a plug in volt meter and see what your current voltage is and what it is when his A/C unit cycles.
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Old 05-23-2009, 03:17 PM   #4
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Neighbor's AC dims my lights!


If your neighbor pulls 20A or 200A you should see a drop on your 240v between 300 or 3000 mVac and 20 or 200 mVac, more likely the lower values.
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