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Sound Reinforcement - Forums for Live Sound Professionals - Your Displayed Name Must Be Your Real Full Name To Post In The Live Sound Forums => AC Power and Grounding => Topic started by: Frank DeWitt on November 26, 2018, 06:52:22 pm

Title: Circuit Breaker plug
Post by: Frank DeWitt on November 26, 2018, 06:52:22 pm
A Circuit Breaker is built into the plug.  If it trips, it unplugs it self!

For my collection only.  Not to be used.
(http://lbpinc.com/CK%20breaker%20plug.jpg)
Title: Re: Circuit Breaker plug
Post by: Tim McCulloch on November 26, 2018, 06:57:21 pm
Frank, your finds continue to surprise and impress.  That's *really* cool!
Title: Re: Circuit Breaker plug
Post by: Frank Koenig on November 27, 2018, 12:57:45 pm
Very cool, indeed. A non sequitur, but this reminds me, for some weird reason, of a cable tension failure detector I saw on a ski lift on Mount Ashland, OR last summer. At the top of the hill there is a huge, ugly chunk of concrete that serves as the tensioning weight for the main rope. Attached to it was a funky, rotting cord and plug arranged so that if the weight moved outside of a certain range the plug would unplug and, presumably, ring a bell or something down at the control panel. Somehow I don't think this lift was made in Switzerland. -F
Title: Re: Circuit Breaker plug
Post by: Tim McCulloch on November 27, 2018, 01:51:48 pm
Very cool, indeed. A non sequitur, but this reminds me, for some weird reason, of a cable tension failure detector I saw on a ski lift on Mount Ashland, OR last summer. At the top of the hill there is a huge, ugly chunk of concrete that serves as the tensioning weight for the main rope. Attached to it was a funky, rotting cord and plug arranged so that if the weight moved outside of a certain range the plug would unplug and, presumably, ring a bell or something down at the control panel. Somehow I don't think this lift was made in Switzerland. -F

It likely unplugs the lift motor.  Probably designed by snow skiing engineers in Lower Alabama and built by Northern South Dakotans from Hoople, SD.
Title: Re: Circuit Breaker plug
Post by: Mike Caldwell on November 27, 2018, 03:33:36 pm
Very cool, indeed. A non sequitur, but this reminds me, for some weird reason, of a cable tension failure detector I saw on a ski lift on Mount Ashland, OR last summer. At the top of the hill there is a huge, ugly chunk of concrete that serves as the tensioning weight for the main rope. Attached to it was a funky, rotting cord and plug arranged so that if the weight moved outside of a certain range the plug would unplug and, presumably, ring a bell or something down at the control panel. Somehow I don't think this lift was made in Switzerland. -F

That sounds like a Rube Goldberg invention!
Title: Re: Circuit Breaker plug
Post by: John Roberts {JR} on November 27, 2018, 04:36:17 pm
My pressure washer has a GFCI built into it's plug. My in-wall heatpump/airco has some sort of a smart plug... with "test" and "use" buttons.

I have seen plugs that sense for leakage to ground and disconnect (different than GFCI).

JR
[edit- I read the OM and my airco has one of those leakage plugs... apparently it's an UL thing protecting against squashed line cords. [/edit]
Title: Re: Circuit Breaker plug
Post by: Lee Douglas on November 27, 2018, 09:07:43 pm
I keep envisioning someone "fixing" that with plumbers tape and a couple drywall screws because, "The damn plug keeps falling out!"
Title: Re: Circuit Breaker plug
Post by: Jonathan Johnson on November 28, 2018, 02:03:11 pm
Years ago, one of my dad's shop buildings was in danger of collapsing -- I think it was the Romex leading into the building that was holding it up. I braced the bulding best I could. I had planned to wire the Romex with a plug and receptacle so it would unplug itself if it did collapse.

But, life got in the way, I moved away, and eventually my brother tore down the building, so my "self-unplugging disaster" never happened.
Title: Re: Circuit Breaker plug
Post by: Kevin Conlon on November 28, 2018, 08:37:04 pm
A Circuit Breaker is built into the plug.  If it trips, it unplugs it self!

For my collection only.  Not to be used.
(http://lbpinc.com/CK%20breaker%20plug.jpg)
OMG i have one of those, without the box. Once apon a time it was a good idea. (i tested it, it worked!)