High Leg to Wye

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kfenn22

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Do I need to change out the "orange" bus bar in the panels when I convert an existing High-leg Delta to a Wye configuration? (120/208) Or just changing the marking on the panel enough.
 
110.15 High-Leg Marking.
On a 4-wire, delta-connected system where the midpoint of one phase winding is grounded, only the conductor or busbar having the higher phase voltage to ground shall be durably and permanently marked by an outer finish that is orange in color or by other effective means. Such identification shall be placed at each point on the system where a connection is made if the grounded conductor is also present.
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As I stated - I have never seen an orange busbar, doesn't mean they are not available. I believe you will be O.K. with re-identifying the panel effectively and not changing the busbar. IMHO of course.
 
All high legs must be "orange", but not all "orange" legs are high.

No, you do not need to "un-color" the high leg bussing.
 
One observation: most 480Y/277 systems I have seen are identified brown-orange-yellow. The orange leg is not a high leg, as it is a wye system.
 
georgestolz said:
One observation: most 480Y/277 systems I have seen are identified brown-orange-yellow. The orange leg is not a high leg, as it is a wye system.
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I think that is why there is a nove to make it purple.Matters not to me as i assume nothing,white just might be 277 check everything you did not do yourself
 
color codes

color codes

About 17-18 years ago 277/480 was Yellow,Brown,Purple, it was changed due to in low light conditions Brown and Purple was hard to distinguish. I have heard of some localities still requiring it. The standard, but not required by code is Brown,Orange,Yellow for this voltage. I had a problem with an AHJ with an install that required 277/480 wye and 120/240 delta with the high leg. Code does specifically require that the high leg be orange, so I needed to use Purple instead of Orange for the 480. The inspector refused to pass it until I changed it to Orange siting "That he had never seen purple used for 480 before" I explained to the plant manager the danger of this as Orange could be the high leg or 277.
 
In my experience, it's easy to determine if the orange wire is 480 or the high leg of a 240 delta. Just look at the other wires it's with. Around here (Reno), 277/480 is brown, orange, yellow, and gray. 120/240 delta is black, orange, blue, and white. You can't have one ungrounded conductor by itself, so the other wires it's with will determine the system.

The only confusing scenario I can think of would be orange and white. Is it the 240 high leg and neutral, or 277 and the installer ran out of gray? Never seen the former, but have seen the latter.
 
The problem is two fold, you are using the same color for two different voltages (systems), as code requires that they be identified differently and if you are in a low light situation, grey and white are hard to distinguish. The AHJ should have allowed the yellow, brown and purple.
 
purple

purple

In this area the standard for 480 is Brown Yellow Purple. There are some industrial facilities that have both 480 and hi leg 240. The purple allows them to identify each system independently and keep the required ornage for their high-leg systems
 
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