Electrical Question as to Sparks

Old 07-04-04, 08:31 PM
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Electrical Question as to Sparks

I have a question concerning small sparks between the outlet and the blade(s) of the plug upon plugging into the wall outlet in the house.
I noticed this at 2 different outlets.

Should I be concerned? What causes sparks as I don't recall seeing sparks normally when inserting a plug into most outlets.

Thanks for any help

Joe H
Old 07-04-04, 09:29 PM
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Many modern appliances are now in an "always on" mode. That's on enough to have a CPU running to scan the keypads and detect remote controls, and such. When being plugged in, the power supply has to draw a quick bunch of current to charge up the capacitors. You see the sparks due to to that quick inrush of current.

One way to avoid this, and add some protection at the same time, is to add a surge protector power strip. Plug things in with the switch off, then switch it on when ready to go.
Old 07-05-04, 10:24 AM
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I appreciate your advice, I know I could tell in a vehicle if there is a draw by touching the grd cable to the post but I never gave it a thought that it is the same with AC

Again thanks for the solution

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