Who determined to use green for open and red for closed in breakers ?
Who determined to use green for open and red for closed in breakers ?
(OP)
There's a beer bet riding on this....
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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Who determined to use green for open and red for closed in breakers ?
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RE: Who determined to use green for open and red for closed in breakers ?
RE: Who determined to use green for open and red for closed in breakers ?
I have also seen it in India, which otherwise is under IEC influence.
RE: Who determined to use green for open and red for closed in breakers ?
The victory proved somewhat shallow when it was later revealed that Edison was color-blind.
Make mine a Guinness.
RE: Who determined to use green for open and red for closed in breakers ?
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Who determined to use green for open and red for closed in breakers ?
RE: Who determined to use green for open and red for closed in breakers ?
I like red=unsafe, green=safe. I've had clients insist on red=stop, green=go, but I usually try to dissuade the philosophy. Consistency is good.
RE: Who determined to use green for open and red for closed in breakers ?
And of course open for a valve is like closed for a breaker, and open for a breaker is like closed for a valve. So naturally the color for an open valve is opposite the color for an open breaker. The linguistically similar positions must have color-coded oposite positions because the functionally similar positions have the same color and their linguistically similar positions have opposite colors. The color relationship is opposite the linguistic relationship because the linguistic relationship is oppostie to the functional relationship. But at least their color relationship is in accordance with their functional relationship.
time for that beer now...
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RE: Who determined to use green for open and red for closed in breakers ?
Best regards!
RE: Who determined to use green for open and red for closed in breakers ?
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: Who determined to use green for open and red for closed in breakers ?
RE: Who determined to use green for open and red for closed in breakers ?
RE: Who determined to use green for open and red for closed in breakers ?
Green = OK to enter enclosure
Red = Not OK to enter
Steetlight Logic:
Green = OK to enter intersection
Red = Not OK to enter
Just a shot in the dark...
RE: Who determined to use green for open and red for closed in breakers ?
RE: Who determined to use green for open and red for closed in breakers ?
Those consultants never worked on or near a live gear.
RE: Who determined to use green for open and red for closed in breakers ?
RE: Who determined to use green for open and red for closed in breakers ?
The only standard I have seen that has it right is mil standards. Yes,it is dangerous, because a lot of people will not comply with the standard it is all mixed up. Maybe the internation standards can correct this problem.
I don't know why some people are resistant to changing this, my guess it is people that do not like changes period.
RE: Who determined to use green for open and red for closed in breakers ?
Green is a GO in traffic light, because it is safe.
The necessary condition to be safe and to GO in electrical equipment is when the breaker/switch is Open. Where is the confusion?
There is a differnec between Normal condition and safe conditon. Normal conditon may be the breaker is Closed and energized but it is not safe to GO.
RE: Who determined to use green for open and red for closed in breakers ?
As for the origination, don't know, but it's been almost always been around power plants as far as I can tell. Looking at my antique book library (Audel's New Electric Library, 1st Print 1931), volume VI has a chapter about substations, and an example used was a General Electric Supervisory Controller for dispatch stations (the birth of SCADA?) The front of this supervisory controller was full of indicator lights for each station switch position: red=closed, green=open, white=Automatic (tripping) operation, and amber for synchronzing local & remote circuit-selection relays that coordinated alignment for opening/closing desired circuit.
RE: Who determined to use green for open and red for closed in breakers ?
RC
RE: Who determined to use green for open and red for closed in breakers ?
RE: Who determined to use green for open and red for closed in breakers ?
RE: Who determined to use green for open and red for closed in breakers ?
RE: Who determined to use green for open and red for closed in breakers ?
That has to be the most rediculous thing I have every heard.
You got hit going through a green light... poor you ... bad luck... that is all... it still does not diminish the intent of the lights...as with any logic system the system is only as good as the users...
Regards,
TULUM
RE: Who determined to use green for open and red for closed in breakers ?
In the utility industry in the US, the use of red for energized and green for de-energized is nearly universal in transmission and distribution systems. In power plants, this usage is continued by using red for running motor and red for open valve.
But in other industries, it's often exactly the opposite. Many water and wastewater plants use green for ON and red for OFF. I've even some it done both ways in the same plant on different panels. Drives me nuts.
The world would be a much better place if everyone used RED for ENERGIZED, just as the Creator intended.
RE: Who determined to use green for open and red for closed in breakers ?
Really, no one here has a definitive answer?
The two contenders in this thread, IMHO, are:
A COMBINATION OF: Tommy75 with the Navy SOP explanation and
DPC with the "it's only a convention"
===OR===
The fable of "How Corporate Policy is Made"
Start with a cage containing five monkeys. Inside the cage, hang a banana on a string and place a set of stairs under it. Before long, a monkey will go to the stairs and start to climb towards the banana. As soon as he touches the stairs, spray all of the other monkeys with cold water. After a while, another monkey makes an attempt with the same result; all the other monkeys are sprayed with cold water.
Pretty soon, when another monkey tries to climb the stairs, the other monkeys will try to prevent it. Now, put away the cold water. Remove one monkey from the cage and replace it with a new one. The new monkey sees the banana and wants to climb the stairs. To his surprise and horror, all of the other monkeys attack him. After another attempt and attack, he knows that if he tries to climb the stairs, he will be assaulted.
Next, remove another of the original five monkeys and replace it with a new one. The newcomer goes to the stairs and is attacked. The previous newcomer takes part in the punishment with enthusiasm! Likewise, replace a third original monkey with a new one, then a fourth, then the fifth. Every time the newest monkey takes to the stairs, he is attacked. Most of the monkeys that are beating him have no idea why they are not permitted to climb the stairs or why they are participating in the beating of the newest monkey.
After replacing all of the original monkeys, none of the remaining monkeys have ever been sprayed with cold water. Nevertheless, no monkey every again approaches the stairs to try for the banana.
Why not?
Because as far as they know that’s the way it’s always been done around here.
RE: Who determined to use green for open and red for closed in breakers ?
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