medium voltage

[jtorres]

what colors would you use to identify medium voltage cable?

 

[Mule]

You know, I dont believe I've seen them colored, always L1,L2,L3 or T1,T2,T3,or tag#-1, tag#-2, tag#-3

But someone else maybe has.......................

 

[Nick]

The standard in my area is Yellow, Red, Blue

 

[zog]

what colors would you use to identify medium voltage cable?

There is no standard, I have done MV work in dozens of states and see it vary from state to state, check with your local NETA testing guys, they will give you some insight on the local "usual" marking, plus they will be the ones testing your install anyways.

 

[eric9822]

We usually label the raceway or the tray to identify Medium Voltage services.

 

[ohmhead]

Well down here in florida some label or tag cables with A , B , C or show loop A or B or C if not tagged we use standard old colored tape brown orange yellow or purple sometimes just a means to label or so one can see the phases of each high voltage cable but the power company does not do it just us electricians . They just tell us if its abc or cab or bca coming into our box or transformers we label it our way they dont care . Best to yas

 

[zog]

Well down here in florida some label or tag cables with A , B , C or show loop A or B or C if not tagged we use standard old colored tape brown orange yellow or purple sometimes just a means to label or so one can see the phases of each high voltage cable but the power company does not do it just us electricians . They just tell us if its abc or cab or bca coming into our box or transformers we label it our way they dont care . Best to yas

Thats very dangerous! Using standard LV colors and lettering can cause someone to mistake them for LV sometime in the future, you may want to reconsider you policies before someone gets killed.

Use any other colors, and label XYZ.

 

[Nick]

Zog,
I recently did a large water treatment plant where the specs called for 480V systems, 4160V systems and the 12KV systems to all be brown orange yellow. It didn't make any sense but they wouldn't budge. When municipalities write a spec sometimes it's extremely difficult to get them to modify it even if it's wrong.
And by the way, you are right there is no standard. "Usual" would be a better terminology to use.

 

[don_resqcapt19]

Nick,
Compliance with that spec will most likely result in a violation of 215.12(C) of the 2008 NEC.

 

[ohmhead]

ZogThats very dangerous! Using standard LV colors and lettering can cause someone to mistake them for LV sometime in the future, you may want to reconsider you policies before someone gets killed.

Use any other colors, and label


Well we have never seen a electrical inspector in a power plant yet . florida power kinda does there own inspections with Black & Veach engineering and the plants engineer crew is very well schooled in the different voltages not alot of mishhaps but like i said we brass tag phases and kinda use the br- or yel for pulling somtimes we leave it on sometimes we take it off .
If you think about it what color tells me its low voltage or what standard ? who is neta never heard of them ? show me and ill bring it up at the job .Best to yas

 

[nakulak]

when required to use the "wrong" colors for whatever reason, its always a good idea to simply tag the wires with the voltages as well (imsho)

 

[don_resqcapt19]

ZogThats very dangerous! Using standard LV colors and lettering can cause someone to mistake them for LV sometime in the future, you may want to reconsider you policies before someone gets killed. ...

No one should ever rely on either colors or labels to identify the voltage of the sytem.

 

[ohmhead]

Tag it a phase b phase c phase

Tag it a phase b phase c phase

Well we never said we were marking voltage , we just marked the ABC phases of the conductors which is kinda normally done with a brass tag to also tell which loop or direction its going to and from . take care

 

[zog]

No one should ever rely on either colors or labels to identify the voltage of the sytem.

Right, no one should ever contact live parts either, but stuff happens, making something look like LV when it is MV is only increasing the risk factor. Different colors and XYZ are the usual for MV.

 

[LLSolutions]

MV to me is in the 15kv area. Our POCO requires that ABC be marked at both ends with A-1 ring of tape B-2 rings of tape C-3 rings of tape, they won't except colors, I assume that's because they take so long to tie into the pole that everything would be white by the time they got there.

 

[Aretae]

110.15

110.15

Zog,
I recently did a large water treatment plant where the specs called for 480V systems, 4160V systems and the 12KV systems to all be brown orange yellow. It didn't make any sense but they wouldn't budge. When municipalities write a spec sometimes it's extremely difficult to get them to modify it even if it's wrong.
And by the way, you are right there is no standard. "Usual" would be a better terminology to use.

I believe 110.15 reserves orange for "stinger" legs. May it be used arbitrarily?