THHN/THWN/THWN-2 Wire

1. Applications: for use in electrical wiring of buildings, feeder circuits, branches and secondary industrial, commercial and residential indoor networks. They are suitable for installation in ducts, pipes, boards, and cable trays.

2. Standard: UL83

3. Structure:

Conductor: Soft copper or aluminium alloy 8000 series concentric stranded wires, Class B;

Insulation: Polyvinyl chloride (PVC), flame retardant (FR), resistant to heat, abrasion and humidity, resistant to sunlight (SR) in black, free of hazardous substances (RoHS)

Jacket: polyamide (nylon), resistant to oil (GR II).

4. Voltage: 600V

5. Working temperature:

THHN: in dry locations only not exceed 90°C.

THWN: in dry locations not exceed 90°C, and wet condition not exceed 75°C.

 THWN-2: in either wet or dry applications not exceed 90°C.

6. Minimum bending radius: 12XOD of cable.

Demensions&characteristics of copper conductor:
Conductor size	No.  of wires in cond.	Insulation thickness	Min.Jacket thickness	Approx. OD of cable	Approx  weight of cable	Max.  DC resistance of conductor @20℃
AWG	Nos.	[MM]	[MM]	[MM]	[kg/km]	[Ω/KM]
14	1	0.38	0.1	2.6	24	8.4500
12	1	0.38	0.1	3.0	36	5.3100
10	1	0.51	0.1	3.8	56	3.3400
14	19	0.38	0.1	2.9	25	8.6200
12	19	0.38	0.1	3.4	37	5.4300
10	19	0.51	0.1	4.3	58	3.4100
8	19	0.76	0.1	5.6	95	2.1400
6	19	0.76	0.13	6.6	144	1.3500
4	19	1.02	0.15	8.3	232	0.8480
3	19	1.02	0.15	9.0	283	0.6730
2	19	1.02	0.2	9.8	349	0.5340
1	19	1.27	0.2	11.3	448	0.4230
1/0	19	1.27	0.2	12.1	554	0.3350
2/0	19	1.27	0.2	13.2	686	0.2660
3/0	19	1.27	0.2	14.4	852	0.2110
4/0	19	1.27	0.2	15.8	1059	0.1670
250	37	1.52	0.2	17.6	1268	0.1420
300	37	1.52	0.2	18.9	1502	0.1180
350	37	1.52	0.2	20.1	1735	0.1010
400	37	1.52	0.2	21.3	1977	0.0885
500	37	1.52	0.2	23.6	2440	0.0709
600	61	1.78	0.2	26.0	2947	0.0590
750	61	1.78	0.2	28.6	3650	0.0472
Demensions&characteristics  of aluminium conductor:
Conductor size	No.  of wires in cond.	Insulation thickness	Min.Jacket thickness	Approx. OD of cable	Approx  weight of cable	Max.  DC resistance of conductor @20℃
AWG	Nos.	[MM]	[MM]	[MM]	[kg/km]	[Ω/KM]
8	7	0.76	0.1	5.2	44	3.5150
6	7	0.76	0.13	6.1	61	2.2110
4	7	1.02	0.15	7.7	100	1.3900
3	7	1.02	0.15	8.2	118	1.1030
2	7	1.02	0.2	9.1	142	0.8745
1	18	1.27	0.2	10.5	186	0.6934
1/0	18	1.27	0.2	11.4	224	0.5498
2/0	18	1.27	0.2	12.5	270	0.4361
3/0	18	1.27	0.2	13.7	328	0.3459
4/0	18	1.27	0.2	15.0	398	0.2743
250	35	1.52	0.2	16.7	484	0.2322
300	35	1.52	0.2	17.9	564	0.1935
350	35	1.52	0.2	19.1	643	0.1659
400	35	1.52	0.2	20.2	724	0.1450
500	35	1.52	0.2	22.1	878	0.1161
600	58	1.78	0.2	24.7	1070	0.0967
750	58	1.78	0.2	27.1	1304	0.0774