What is "Low Voltage"

I don't have a copy of the NEC. What is the upper voltage limit for "Low Voltage" so that the wires don't have to be buried 2 feet underground? 12 V? 24? 70V?
--
Walter
www.rationality.net
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On Sat, 18 Aug 2007 09:25:37 -0700, Walter R. wrote:

Online 2005 NEC:
http://www.nfpa.org/freecodes/free_access_document.asp
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30 Volts or under.
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On Sat, 18 Aug 2007 11:48:56 -0700, Molly Brown

No, you have to choose one of the three. This game show is regulated by the USGSFPC,
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wrote:

In a dwelling a 15/20a 120v circuit that is GFCI protected can be 12" down. If you want to avail yourself of the 725 class 2 rules than make it 6" the other poster is correct 30v, current limited supply.
BTW you can also get confused when people talk about "low voltage" with the utility since that is 600v or less to them. Medium voltage is up to 4500 or so and over that is high voltage.
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NEC 490.2 (Equipment over 600V) defines high voltage as over 600V.
NEC 551.2 (Recreation park) low voltage as 24V or less.
For many, low voltage is 600V or less, medium voltage is up to 40kV(maybe even higher).
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