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Author Topic: Using an air conditioneer pair shielded poer cord  (Read 420 times)

WA2ISE

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Using an air conditioneer pair shielded poer cord
« on: October 15, 2022, 05:58:52 PM »

I salvaged a power cord off a junked air conditioner.  More recent manufactured window air conditioners have a power cord where both current carrying wires are shielded.  And a third ground wire.  The shields are not grounded, and if you do connect the shields to ground, the 'smart" plug turns the power off, as it must think the power cord is being cut by something grounded?   Anyway, I remove that smart plug and use a regular 3 prong grounding power plug
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Above I grounded the shields to the ground wire, and the idea is that the powerline is now shielded from RF fields.  To keep your power supply from getting RFIed.  Or to contain RFI from a switching power supply.  I acquired a female IEC plug you can wire to a power cord at a local hamfest, as my power supply uses an IEC power connector.  (IEC is the sort of connector you find on desktop PC power supplies). 
« Last Edit: October 15, 2022, 06:04:20 PM by WA2ISE »
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N4MQ

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Re: Using an air conditioneer pair shielded poer cord
« Reply #1 on: October 16, 2022, 07:30:18 AM »

More likely the shield capacity is causing enough current to trip the gri.  I had to split a long feed run of romex in a metal building due to the capacity effect with no loads applied. Woody
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AC2EU

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Re: Using an air conditioneer pair shielded poer cord
« Reply #2 on: October 16, 2022, 07:50:55 AM »

Did you reverse line and neutral on the terminals? It should be  brass =black ,silver =white

WA2ISE

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Re: Using an air conditioneer pair shielded poer cord
« Reply #3 on: October 16, 2022, 01:16:18 PM »

Did you reverse line and neutral on the terminals? It should be  brass =black ,silver =white

This is a 240V plug, so both the white and the black are hot.  Green is still ground.
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WA2ISE

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Re: Using an air conditioneer pair shielded poer cord
« Reply #4 on: October 18, 2022, 04:56:18 PM »

I added this to my web page at
http://www.wa2ise.com/radios/ham.htm#20ba7
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KC3TEC

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Re: Using an air conditioneer pair shielded poer cord
« Reply #5 on: November 09, 2022, 02:51:42 PM »

Did you reverse line and neutral on the terminals? It should be  brass =black ,silver =white

This is a 240V plug, so both the white and the black are hot.  Green is still ground.

That would be the original scheme for a three wire 240 volt device such as an ac unit, 240 volt water heater, electric drier, and electric range top( wire size however would be different for the loads)
The color scheme is also used in 110 volt ac systems( black= hot, white= neutral, and green= ground)

4 wire ac 240 would be black= leg1 hot, red = leg2 hot, white= neutral, and green/ bare= ground.

European colors are different.
As i recall ( if my memory is correct ???)
Brown is leg1, white or grey is leg 2, and blue is neutral or earth.
But as i stated If my memory is correct, because it has been a long time.

Dc wiring schemes are a whole nuther animal when you add floating ground, signal, signal return, control voltage, etc.
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