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本帖最后由 stey 于 2013-11-14 17:05 编辑 4 |8 l+ b, F- ~8 q- n
8 A/ t! {( o% s$ R5 `' U8 c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).). f( S- H- I3 F3 N) G3 T0 ^
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UL 13:2007 有功率限制的电路电缆Standard for Power-Limited Circuit Cables X7 _+ A) H* r$ ^' o
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Power-Limited Circuit Cables1 K3 R+ E/ l7 e7 z r1 V* q
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UL 13
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4 \, V9 H k$ i1.1 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:- `1 x; y2 B0 d, W& |7 Q: P \1 A
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a) Types CL3P and CL2P (plenum cables),
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b) Types CL3R and CL2R (riser cables),. ]2 H3 M4 y+ G6 W( {
: ]' D8 p& J$ F; a9 `c) Types CL3 and CL2 (commercial cables for other than plenum, riser, or tray uses),
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d) Types CL3X and CL2X (cables for limited use), and8 G- h! w0 q3 n8 r+ _0 S
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e) Type PLTC (cable for non-plenum and non-riser Class 3 and Class 2 circuits in general and in trays). |
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