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-   -   testing a 240 outlet (http://www.homebrewtalk.com/f170/testing-240-outlet-375148/)

nutty_gnome 12-19-2012 02:35 AM

testing a 240 outlet
I've got a multimeter.

I have an outlet with 3 openings spaced 60deg around the outer edge with a hole in the middle (which may be for a recessed screw? can't see into it it is out of the way behind a dryer).

I think it looks a LOT like this: http://www.justanswer.com/uploads/Edward67/2007-12-05_204620_dryer_outlet.jpg

It is wired into the panel but I haven't taken the panel apart to see whats up. Is there a simple way to test if the outlet is live with 220 or 240v using the multimeter? If so, what goes where and what reading would I be looking for?

Any advice is appreciated. Thanks!

jCOSbrew 12-19-2012 02:56 AM

Hot to hot will measure 220v ac. Hot to gnd or hot to neutral will measure 110v ac.

grandequeso 12-19-2012 04:10 AM

you may find voltages anywhere between 220-255volts. dont be surprised if you your voltage isnt dead on 240.

BadNewsBrewery 12-19-2012 11:04 AM

Set your multimeter to Voltage - AC; shove the red probe into one of the openings; shove the black probe into another opening; wiggle probes around while watching meter to see if you get a reading.

passedpawn 12-19-2012 11:22 AM


Originally Posted by jCOSbrew (Post 4696528)
Hot to hot will measure 220v ac. Hot to gnd or hot to neutral will measure 110v ac.

This, except I would expect 120VAC and 240VAC.

Also, doesn't matter which color probe you put in the holes. It will read the same regardless.

nutty_gnome 12-19-2012 01:04 PM

I didn't find any power in it with the multimeter. And now it looks like a relic from the last version of the electric panel. oh well. Thanks for the input.

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