美标UL认证低烟无卤阻燃电缆。低烟无卤类电缆是由特定的不含氯、氟等卤化物的聚烯烃阻燃材料制成。具有良好的阻燃及耐火性能，如果发生火灾，电缆本身不支持燃烧，能防止火灾蔓延。及时被点燃，也不会释放出含卤素的有  体，是比普通的PVC电缆   可靠、 环保的传输电能及测量用电缆。呗广泛应用于高层建筑、地铁、核电站、及大型公共场所。
TYPE RHH/RHW/RHW-2
Scope
This specification covers type RHH/RHW/RHW-2 cable with soft annealed copper solid or stranded conductor; heat and moisture resistant XLPE insulation, conforming to Standard 44 of Underwriters Laboratories,202443. 
Application
Type RHH/RHW/, indoors or outdoors, in raceways,90℃ dry, RHW is rated at a conductor temperature of 75℃ wet or dry, RHW-2 is rated at a conductor temperature of 90℃600V or 2000V application. 
Construction
Conductors: Soft annealed copper, bare or tinned.
Sizes 14AWG-2000kcmil: Solid or stranded.
Insulation:: per UL44.
A Polyester film as a separator between the conductor and the insulation is optional.
Information  on  the  cable:  AWG or kcmil size, type letters, rated voltage, the name of the manufacturer, UL file number, characteristic, manufacture date, FEET.

Table 1
Type RHH Cable Data
Size
AWG	Strands
No./OD.
(mm)	XLPE
Insulation
Average
Thickness
(mm)	Approx.
O.D.
(mm)	
Resistance
(20℃,
Ω/km)
(Bare Copper)	
Resistance
(20℃,
Ω/km)
(Tinned Copper)
14	7/0.62	1.14	4.35	8.62	8.96
12	7/0.77	1.14	4.80	5.43	5.64
10	7/0.98	1.14	5.43	3.41	3.55
8	7/1.23	1.52	6.98	2.14	2.23
8	41/0.511	1.52	7.49	2.14	2.23
6	7/1.56	1.52	7.97	1.35	1.40
4	7/1.96	1.52	9.17	0.848	0.882
2	7/2.47	1.52	10.70	0.534	0.555
1/0	19/1.89	2.03	13.81	0.335	0.349
2/0	19/2.12	2.03	14.96	0.266	0.276
4/0	19/2.68	2.03	17.76	0.167	0.172
350	61/1.92	2.41	22.44	0.101	0.105
500	37/2.95	2.41	25.81	0.0709	0.0729
750	61/2.82	2.79	31.34	0.0472	0.0486