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本帖最后由 stey 于 2013-11-14 17:05 编辑 - G$ d" u' K; p7 y+ e, ^& c# T
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这种线一般是低压线,(更正:电压具体看标准Cables for Class 3 circuits are rated for 300 volts but are not so marked. Cables for Class 2 circuits do not have a voltage rating. See 46.1 (h).)! N, F! d. _4 N- a0 C+ d) E# {- K) `
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UL 13:2007 有功率限制的电路电缆Standard for Power-Limited Circuit Cables
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1 ~+ J( j$ u p2 y) A9 h' R( ZPower-Limited Circuit Cables
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1 Scope
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8 Q2 y0 Y! c- E. o% R1.1 These requirements cover 60 - 250°C (140 - 482°F) single- and multiple-conductor power-limited circuit cables for use as fixed wiring within buildings (some are also marked for direct burial) principally for Class 3 and Class 2 circuits as described in Article 725 and other applicable parts of the National Electrical Code (NEC). Cables covered by these requirements are:0 j) B( |% b& }' T# V$ O W4 O
* Q/ B+ `- w9 Q, _! la) Types CL3P and CL2P (plenum cables),
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' S$ I, i8 I+ j3 `+ j# a+ Eb) Types CL3R and CL2R (riser cables),
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. f% g0 J/ L' m% V, K! P4 o! ec) Types CL3 and CL2 (commercial cables for other than plenum, riser, or tray uses),& u# @9 u1 I1 b8 \7 o, C( a3 D
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d) Types CL3X and CL2X (cables for limited use), and
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) e, r2 n" ~; u, e1 E9 o" g; he) Type PLTC (cable for non-plenum and non-riser Class 3 and Class 2 circuits in general and in trays). |
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