美国标准UL62，UL83主要在建设敷设中使用。
　　主要产品包括　35kv及以下交联电缆、10kv及以下架空绝缘电缆、PVC绝缘电力电缆、裸线、布电线、控制电缆、低烟无卤电缆、各类阻燃和耐火电缆、尼龙护套线、汽车配套线、数据传输电缆、通信电缆及光纤光缆等。公司产品广泛应用于电力、电信、石化、冶金、建筑等行业，同时我们还与朗讯等跨国公司建立了良好的业务关系。　
TYPE TW/THW/THW-2 
Scope
This specification covers type TW/THW/THW-2 cable with soft annealed copper solid or stranded conductor and PVC insulation, conforming to Standard 83 of Underwriters Laboratories,210924. 
Application
Type TW/THW/THW-2 are intended for general purpose applications utilized in conduit or other raceways for services, feeders and branch-circuit wiring as specified in the National Electric Code (NEC). TW is rated at a conductor temperature of 60℃ dry or wet, THW is rated at a conductor temperature of 75℃ dry or wet, THW-2 is rated at a conductor temperature of 90℃600V application.
Construction
Conductors: Soft annealed copper, bare or tinned.
Sizes 14AWG-2000kcmil: Solid or stranded.
Insulation:: per UL83.
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 THW-2 Cable Data
Size
AWG	Strands
No./OD.
(mm)	PVC
Insulation
Average
Thickness
(mm)	Approx.
O.D.
(mm)
Resistance
(20℃,
Ω/km)
(Bare Copper)
Resistance
(20℃,
Ω/km)
(Tinned Copper)
14	41/0.254	0.76	3.38	8.61	9.25
12	65/0.254	0.76	3.97	5.43	5.82
10	104/0.254	0.76	4.65	3.41	3.66
8	168/0.254	1.14	6.90	2.18	2.35
6	133/0.36	1.52	8.48	1.38	1.46
4	133/0.465	1.52	10.05	0.865	0.918
2	168/0.511	1.52	11.72	0.544	0.566
1	208/0.511	2.03	13.75	0.431	0.449
1/0	266/0.511	2.03	14.76	0.345	0.359
2/0	342/0.511	2.03	16.82	0.273	0.285