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This is in a hotel, where there are obviously many, many circuits to manage. Can we tell what information is encoded in these labels?

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Not an answer (can new users not leave 'comments'?) but... If I read bottom labels on the telecom connectors correctly, one contains a 'V' and the other a 'D' - I bet that's 'Voice' (telephone) and 'Data' (computer networking). – randomdude Jul 2 '12 at 19:43

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On the first plug, the GLD is the panel name, and the 15,17,19 is the breaker spaces that it takes. It is a 3 phase receptacle, but I cannot tell you what NEMA configuration it is.

Same goes for the 20 amp receptacle next to it, 1LB is the panel name and the 11 is the space in the panel the breaker is in.

The telcom labeling probably leads you the same way.

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Awesome. Can you guess what the GLD and 1LB stand for? – Jay Bazuzi May 27 '12 at 7:57
Also, are those labels required by code, or just a common convention? – Jay Bazuzi May 27 '12 at 8:32
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Panel names, I'm not sure about. They were given before the hotel was built but would make sense if you had the plans, looking at the main feeds and locations. I don't think the labels are code, just a smart hotel engineer. – lqlarry May 27 '12 at 9:08

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