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PostPosted: Fri Aug 28, 2009 12:35 am 
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Joined: Sun Aug 16, 2009 8:42 am
Posts: 184
Location: Lawrenceburg KY
Arc Flash Hazard Labeling Do's and Don'ts
Ask for this PDF file. To big for me to attach but is a great source of information about labeling.

[url="http://www.easypower.com/arc_flash/arc_flash_resource_center.php"]http://www.easypower.com/arc_flash/arc_flash_resource_center.php[/url]


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PostPosted: Thu Jan 07, 2010 10:21 am 

Joined: Thu Jan 07, 2010 6:42 am
Posts: 35
Location: Bowling Green, KY
We use a tag like this for our 480 volt and lower panels. We put them on the door of the panel, be it 120/208 recepticle/lighting or 480 volt lighting. We also use them on panels for power distribution, all the way up to and including our sub stations (480 volt, spcl. tags for 13,200 v)
We use a program called MarkWare by Brady and I print all of the tags on "weatherproof" vinyl. This is what they look like. I change the information depending on the application/load/voltage etc.

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PostPosted: Thu Feb 11, 2010 10:36 pm 
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Joined: Sun Sep 23, 2007 5:00 pm
Posts: 114
Location: Calgary, Alberta, Canada
Labelling Specification & Schedule

I didn't want to, but have to weigh in on this. In my audit work labeling is all over the map, inconsistent specification, colors, information presented, location, incorrect mitigation labels (e.g. arc flash relay, arc reduction maintenance switch, etc..). Here are a few comments, some you may not like as it will make work for you, but your Electrical Safety Program should cover this off:

1. You shouldn't include HRC for specifying your arc rated clothing on a detailed label when you have completed incident energy analysis. You can only call arc rated clothing by an HRC if you use the Table Method of arc flash hazard analysis.
2. I recommend you stick to ANSI Z535 Standard for the layout of the label and safety colors used, using and applying a consensus based Standard is your best due diliegence in court, using other colors, like blue, pink, green (there is another thread where someone was asked to do this). The colors have meaning and "we" recognize them, "what does pink mean?"
3. I recommend that you "plan" what you do by creating a Arc Flash & Shock Warning label and Signs (for the outside of the doors into your MCC/Electrical Rooms) Labelling Specification & Schedule (table used to document what labels were installed, where and by who). In this specificaiton you stipulate what your simple and detailed label formats are, when you will use Danger (e.g. 40, 50, 60 cal/cm2 if you didn't know the software just defaults to 40 cal/cm2, and you can configure this to tell it when you want Danger).
4. Again on the "plan" theme (e.g. based on ANSI Z10, Plan, Do, Check, Act philsophy) I have attached an MCC elevation drawing that ensures that the label will be installed in the same locations no matter what enterprise wide facility you have them installed in. You a specification and elevation, orthographic drawing to illustrate where you want the labels installed. [I tried to upload pdf, 48kb limit the file was 65kb, if you want the drawing email me at [email protected]].
5. You will see some new direction on labels in next 70E, I am at the Technical Committee meetings in Memphis, TN right now. This also emphasizes that you utlimately need a label management system identified in your Electrical Safety Program.

Enough typing on this one.

Terry Becker, P.Eng.
ESPS Electrical Safety Program Solutions INC.
[email protected]
403-465-3777


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PostPosted: Fri Feb 12, 2010 1:46 pm 
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Joined: Sun Sep 23, 2007 5:00 pm
Posts: 114
Location: Calgary, Alberta, Canada
Labelling Specification & Schedule - Mitigation

Sorry I forgot to add that you also need to ensure you address what labels ar required when you engineer in ("Safety by Design") mitigation:

1. You need labels indicating "Normal" operating incident energy and AFPB data, and when the mitigation is "in service" e.g. arc reduction maintenance switch.
2. I recommend that a general Warning label be installed as well indicating what mitigation is installed and the need for it to be documented in a procedure.
3. When auditing I have found that the actual arc reduction maintenance switch is not labeled, and in somes cases the switch is remotely located to the actual breaker that it relates to, you need to ensure labelling is in place, unique ID for the switch and what switch relates to what breaker.
4. You need one label for the "Line" side and the "Load" side of Main Breaker.

You must manage your labels initially and thereafter as your electrical system changes.

I can't upload the jpegs I have as examples of labels, they are too big for the forum software.

Terry Becker, P.Eng.
ESPS Electrical Safety Program Solutions INC.
[email protected]
403-465-3777


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