THHN/ THWN

UL Standard PVC Insulated Building Wire

Application

THHN/THWN conductors are primarily used in conduit and cable trays for services, feeders, and branch circuits in commercial or industrial applications as specified in the National Electrical Code. Voltage for all applications is 600 volts.

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Installation / Building Cable

Low Voltage Cable

Medium Voltage Cable

Solar Cable

Standards

UL83

Construction

Conductor
1）: Plain annealed solid copper conductor (Sizes: 14-10AWG)
2）: Plain annealed stranded Class B copper conductor (Sizes: 14-1AWG)
3）: Plain annealed stranded Compressed Class B copper conductor (Sizes: 2/0-1000AWG)

Insulation
Polyvinyl chloride (PVC)

Jacket
Nylon

Characteristics

Rated voltages: 600V.
Maximum conductor temperature:
THHN: 90℃ dry 90℃. THWN:75℃ dry or wet , 75℃.
In Oil (Gasoline and Oil resistant I I ) : 75℃.
Features:
Good resistance to moisture, heat, oil, gasoline, chemicals and grease.
Suitable for installation where thermal overload exists.
Strict quality control during manufacturing process.
Flame retardant, UL listed as VW-1.
Smooth nylon jacket aids in easier pulling.
Superior abrasion and mechanical properties.
Installation: For installation in conduit and raceways. Available colors are red, white, blue, green, black, green/yellow etc.

Specifications

Size AWG or MCM	Construction		Nominal Overall Diameter mm	Minimum thickness of nylon jacket mm	Average Thickness of PVC Insulation mm	Approximate Overall Diameter mm	Approximate Weight of Cable kg/km
Size AWG or MCM	No. of Strands	Dia of wires mm	Nominal Overall Diameter mm	Minimum thickness of nylon jacket mm	Average Thickness of PVC Insulation mm	Approximate Overall Diameter mm	Approximate Weight of Cable kg/km
14	solid	1.63	2.63	0.1	0.38	2.63	23.4
12	solid	2.05	3.06	0.1	0.38	3.06	36
10	solid	2.59	3.81	0.1	0.51	3.81	56
14	7	0.62	2.86	0.1	0.38	2.86	24.5
12	7	0.78	3.34	0.1	0.38	3.34	36.7
10	7	0.98	4.18	0.1	0.51	4.18	57.8
8	7	1.23	5.52	0.13	0.76	5.52	95.5
6	7	1.56	6.48	0.13	0.76	6.48	144
4	7	1.96	8.24	0.15	1.02	8.24	229
3	7	2.2	8.96	0.15	1.02	8.96	282.7
2	7	2.47	9.8	0.15	1.02	9.8	352.3
1	19	1.69	11.1	0.18	1.27	11.1	450.7
1/0	19	1.89	12.08	0.18	1.27	12.08	554
2/0	19	2.13	13.34	0.18	1.27	13.34	692.2
3/0	19	2.39	14.64	0.18	1.27	14.64	859.5
4/0	19	2.68	16.04	0.18	1.27	16.04	1067
250	37	2.09	17.79	0.2	1.52	17.79	1280
300	37	2.29	19.09	0.2	1.52	19.09	1521
350	37	2.47	20.39	0.2	1.52	20.39	1757
400	37	2.64	21.49	0.2	1.52	21.49	1996
500	37	2.95	23.59	0.2	1.52	23.59	2469
600	61	2.52	26.17	0.23	1.78	26.17	2994
750	61	2.82	28.77	0.23	1.78	28.77	3718
1000	61	3.25	32.57	0.23	1.78	32.57	4891