Orange receptacle: What does it mean?


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Old 07-07-07, 09:28 PM
J
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Orange receptacle: What does it mean?

In a house we recently bought, there are a few outlets (in a media room) that are orange instead of white.

They appear to be the receptacles intended to have electronics plugged into them (one is on the ceiling near where a projector would mount, and one is in a cubbyhole where I'm guessing electronics are supposed to go.)

Any significance to this? Does orange mean anything in particular, or just whatever whomever installed them wanted it to mean?

Just curious...
 
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Old 07-07-07, 09:39 PM
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Isolated ground. The ground pin is a separate insulated ground that goes directly to the panel instead of being grounded to all the other grounds and metal boxes and conduit along the way like the normal ground. Causes less electric "noise" in that particular ground for some electronics that might be sensitive to it.

This is off the top of my head and may not use textbook terminology.
 
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Old 07-08-07, 05:25 AM
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This means someone wasted their money on an isolated ground receptacle, which is essentially useless in a residence.
 
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Old 07-08-07, 07:09 AM
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What Bob said.
Also, most all IG receptacles in a residence are not installed to code. Typically what folks do is use the red of a "3-wire" as the isolated ground. Quite illegal (and useless) to do so.
 
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Old 07-08-07, 11:34 AM
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Yes an isolated ground has to be wired that way, and it's fairly complicated. However if the original builder/homeowner was a media nut, they may have had it wired properly in the first place. Isolated grounds take out buzz from stray electronic noise (or something like that) which audiophiles and audio engineers can hear, but most others can't. (For example, our recording studio has isolated ground circuits for plugging in the music equipment, but not the general outlets). However, as others said, if it wasn't wired properly from the get-go, there is no difference. Anything can be plugged into these outlets, regardless.
 
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Old 07-08-07, 01:48 PM
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An isolated ground is ALMOST worthless unless used with a metallic wiring method. The intent is to have a ground that doesn't carry all the noise electrical conduit and other things bonded to the electrical system carry. Having the conduit also acts like the shield in an audio cable preventing most noise from getting to the circuit conductors and ground wire. The method works well in commercial facilities and industrial installations where electrical noise is a real concern, and indeed is necessary to get some things to function reliably.

An isolated ground receptacle wired with a non-metallic wiring method allows allows almost any noise to place itself on the conductors, and in a household environment will likely make no difference. A good many audiophile types swear they hear a difference, but honestly can't when I've done an A or B test for them, and an oscilloscope will prove as much.
 
 

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