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Author Topic: brain storm an optimal human safety system for back line  (Read 95635 times)

Mike Sokol

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Re: brain storm an optimal human safety system for back line
« Reply #270 on: June 22, 2015, 04:52:18 pm »

Sweet....  we can work on that name... I like something like "the only accurate tester" or something like that.

JR

Can I still call my Soviet outlet simulator the Discombobulator? ;)
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Mike Sokol
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John Roberts {JR}

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Re: brain storm an optimal human safety system for back line
« Reply #271 on: June 22, 2015, 04:55:22 pm »

Can I still call my Soviet outlet simulator the Discombobulator? ;)
You could call it a newbie killer...

Seriously do you incorporate a GFCI in front of that re-matrix switch so it will be harder to hurt the meat puppets with dangerous settings?

JR
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Mike Sokol

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Re: brain storm an optimal human safety system for back line
« Reply #272 on: June 22, 2015, 05:08:14 pm »

You could call it a newbie killer...

Seriously do you incorporate a GFCI in front of that re-matrix switch so it will be harder to hurt the meat puppets with dangerous settings?

JR

Yes I use an in-line extension cord GFCI which opens up if there's an external fault to ground downstream. And the rotary switches make it impossible to cross-connect the Line, Neutral and Ground lines to a common outlet contact. I've done a lot of thinking about this...

BTW: I'm going to build an extra one of these if anyone would like to try it out. Only experienced engineers and electricians need apply since it can create some really dangerous outlet conditions. 
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Mike Sokol
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Mike Sokol

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Re: brain storm an optimal human safety system for back line
« Reply #273 on: June 22, 2015, 05:57:35 pm »

Think I'll hard-wire a GFCI plug into the power cable for my Outlet Confuser Matrix (is that a better name?). That way the GFCI can't be taken out of the circuit by someone else not as careful as me. The OCM will be able to generate lethal outlet conditions if you plug something like a guitar amp into it, so I guess it needs hard-wired protection.
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Mike Sokol
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John Roberts {JR}

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Re: brain storm an optimal human safety system for back line
« Reply #274 on: June 22, 2015, 07:01:29 pm »

It's literally a mains wiring fault simulator...  unless that name is already taken.

JR
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Stephen Swaffer

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Re: brain storm an optimal human safety system for back line
« Reply #275 on: June 22, 2015, 07:20:01 pm »

Another thought would be to install a momentary (insulated) switch that must be held closed in order to energize the receptacle.  That would still leave one hand free to use a DMM probe to discover the fault-but prevent anyone from trying to use it to power any sort of load.
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Steve Swaffer

Mike Sokol

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Re: brain storm an optimal human safety system for back line
« Reply #276 on: June 23, 2015, 04:28:39 pm »

Well, JR's Frankenstein circuit board arrived, and I've just run an initial test using my standard 3-outlet comparison strip. While I don't have all combinations of outlet failures represented here, it's enough for me to verify that his circuit can correctly detect the difference between a ground at earth potential, and one at 120-volts. See below. Now I need to rig up a test that will let me vary the ground and neutral voltages to find the threshold where the LEDs turn on. Should be interesting.... 8)
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TJ (Tom) Cornish

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Re: brain storm an optimal human safety system for back line
« Reply #277 on: June 23, 2015, 04:31:42 pm »

Well, JR's Frankenstein circuit board arrived, and I've just run an initial test using my standard 3-outlet comparison strip. While I don't have all combinations of outlet failures represented here, it's enough for me to verify that his circuit can correctly detect the difference between a ground at earth potential, and one at 120-volts. See below. Now I need to rig up a test that will let me vary the ground and neutral voltages to find the threshold where the LEDs turn on. Should be interesting.... 8)
Is JR's tester rated at CAT IV 1000v?  :)
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John Roberts {JR}

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Re: brain storm an optimal human safety system for back line
« Reply #278 on: June 23, 2015, 04:38:25 pm »

Is JR's tester rated at CAT IV 1000v?  :)

No... but if you have enough money to spend,,,,

JR
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TJ (Tom) Cornish

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Re: brain storm an optimal human safety system for back line
« Reply #279 on: June 23, 2015, 04:38:59 pm »

No... but if you have enough money to spend,,,,

JR
I heard that bubble wrap has a pretty high dielectric strength.
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