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<TITLE>Re: [RE-wrenches] NEC Signs, Labels, Plaques,?</TITLE>
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<FONT SIZE="5"><FONT FACE="Helvetica, Verdana, Arial"><SPAN STYLE='font-size:14pt'>Ray wrote: like what is the difference between a sign, a plaque, a directory, a label, and marking??<BR>
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None of these are actually in NEC Article 100 – Definitions. So, it’s actually a perfectly good question to ask.<BR>
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The one thing I’m super clear on—because it was a favorite with our local inspector</SPAN><SPAN STYLE='font-size:10pt'>—is that a directory is a map, showing the relative location of components that are related but not grouped together. Locating inverters on a roof that is not readily accessible, for example, triggers the requirement for a directory. It’s a great for the tech who has to service the project 10, 15, 20 years from now. But it’s especially useful for inspectors, facilities personnel, fire fighters and electricians unfamiliar with a/the PV system.<BR>
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As for the rest: when you say “plaque”, I think engraved...“label” not so much...“warning sign” sounds pretty serious, but Exhibit 110.8 of the NEC Handbook basically calls a sticker a “sign”. Some of these label/sign/plaque issues are dealt with in more detail in local codes. Their probably detailed best in RFPs and RFQs, which typically have a spec section calling out approve sign materials. Whatever the Code does or does not say, the only label I trust implicitly outdoors and in full sun for 20+ years is engraved. That’s what all the best facilities require.<BR>
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Anyone actually own an engraver? How much do you have to spend engraving labels every year before you just go out and buy the equipment?<BR>
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