求助ul21456规格，多谢！！

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APPLIANCE WIRING MATERIAL

Subj.758	Section 2	Page 21456	Issued:2005-09-30
			Revised:2011-10-26

Style 21456

Multiconductor cable with extruded non-integral jacket

Rating	80 deg C, 30 Vac, Horizontal flame.
Insulation	Labeled or complying with manufacturers procedure.
Assembly	Two or more insulated conductors.
Covering	Optional.
Shield	Optional.
Jacket	Extruded mPPE-PE.
	Diameter of core assembly under jacket *	Minimum average thickness	Minimum thickness at any point
	0.250 inch or less	15 mils	12 mils
	0.251-0.350 inch	22 mils	18 mils
	0.351-0.424 inch	30 mils	24 mils
	0.425-0.700 inch	60 mils	48 mils
	* - Equivalent diameter of flat assembly = 1.1284 X (TW)^0.5. Where T is the thickness of the assembly under jacket, and W is the width of the assembly under jacket.
Standard	Appliance Wiring Material UL 758.
Marking	General.
Use	Internal wiring in Class 2 circuits and both ends are terminated in connectors.

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这个学习了

十分感谢版主，请教一下同一种规格会有不同的UL型号吗？如：UL21456 and 21451的区别，多谢谢！我太不专业了。

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