Thhn cables / thwn / Thwn-2

thhn thwn-2 cable, Copper cables, American Standard cables

Flashy cable | High temperature resistance 90 °C | Protection against rodents and termites | Lightness for conduit | Certification export | Low smoke and halogen free
Double protection nylon + PVC, oil and chemical resistant, doubled lifespan compared to standard cables.
Operating temperature : -40 °C to 90 °C, Suitable for dry and humid environments, ideal for photovoltaics, industry and housing.

Table of Contents

Product description

THHN/THWN-2 cable is a versatile American standard electrical cable, with a nominal voltage of 600V. The THHN has a nylon sheath, while the THWN-2 has a PVC jacket. Both types are insulated with flame retardant PVC and withstand temperatures up to 90°C in a dry environment / humid. Their double-layer structure (PVC Ignifuge + nylon) offers excellent resistance to wear and chemicals. They are widely used in the electrical distribution of buildings (air conditioning, elevators), power supply of industrial equipment (oil resistance and dynamic flexing) as well as in photovoltaic and energy storage systems.

Construction

Unshielded cable

Component	THHN	Thwn-2
Driver	Copper receipt (toronné classe B)	Copper receipt (compact class C stranded)
Driver	Stranding density : ≥90%	Stranding density : ≥95%
Isolation	PVC (Vinyl polychloride)	PVC (Vinyl polychloride)
Isolation	Rated temperature : 90°C (in a dry environment)	Rated temperature : 90°C (in a humid environment) / 75°C (in a dry environment)
Sheath	Nylon	PVC
ZMS CABLE can Customize cables according to your material and specification requirements.

Structure with shielding (additional components)

Component	Settings
Screen	Structure : Aluminum foil (thickness 0,05 mm) + tinned copper braid (coverage rate 90%)
Screen	Shield resistance : ≤25 mΩ/m
Outer sheath	Material : PVC (standard) or LSZH (low smoke and halogen free)
	Thickness : 1,2 mm (12 AWG)
	Fire resistance : IEC 60332-1

Applications of THHN/THWN-2 cable

Building sector : Power supply for home renovations, lighting wiring, particularly suitable for electrical systems in high-rise buildings and collective residences.
Industrial environments : Electrical connections for factory equipment and machine tools, its heat and oil resistant characteristics are suitable for chemical and manufacturing environments.
Public infrastructure : Fixed installation in commercial buildings, mining and energy storage systems, meeting the needs of high loads and complex environments.
Renewable energies sector : Installation of outdoor cables in photovoltaic power plants and wind farms, with exceptional performance in weather and corrosion resistance.
Household appliances : Connections for electrical devices in humid environments (refrigerators, making things, etc.), compliant with UL and CE safety standards.

Standard

UL 83 ( THHN ) 、UL 44 ( Thwn-2 ), NEC, NTC 1332

Settings

Tension nominale	600 V
Minimal curvature radius	8 × outside diameter
Tensile strength	≥20 MPa (nylon sheath)
Temperature range	-40 ℃ to 90 ℃ (temporarily until 105 ℃)
Features	Abrasion resistance, to UV rays, with acids and bases, as well as oils (test ASTM D471, 120 hours without degradation)

Technical data

Driver					Average insulation thickness		Minimum sheath thickness		Nominal external diameter		Approximate net weight
Size	Nominal section	Number of strands	Driver diameter		Average insulation thickness		Minimum sheath thickness		Nominal external diameter		Approximate net weight
AWG-kcmil	mm²		mm	mils	mm	mils	mm	mils	mm	mils	mm	mils
14	2.08	1	1.63	64	0.38	15	0.10	4	2.6	102	22	15
12	3.31	1	2.05	81	0.38	15	0.10	4	3.0	118	34	23
10	5.26	1	2.59	102	0.51	20	0.10	4	3.8	150	54	36
14	2.08	7	1.80	71	0.38	15	0.10	4	2.8	110	24	16
12	3.31	7	2.26	89	0.38	15	0.10	4	3.2	126	37	25
10	5.26	7	2.87	113	0.51	20	0.10	4	4.1	161	58	39
8	8.37	7	3.61	142	0.76	30	0.13	5	5.5	217	96	65
6	13.3	7	4.52	178	0.76	30	0.13	5	6.3	248	143	96
14	2.08	19	1.80	71	0.38	15	0.10	4	2.8	110	24	16
12	3.31	19	2.29	90	0.38	15	0.10	4	3.4	134	37	25
10	5.26	19	2.87	113	0.51	20	0.10	4	4.2	165	58	39
8	8.37	19	3.63	143	0.76	30	0.13	5	5.8	228	98	66
6	13.3	19	4.55	179	0.76	30	0.13	5	6.6	260	147	99
4	21.2	19	5.74	226	1.02	40	0.15	6	8.4	331	230	155
3	26.7	19	6.45	254	1.02	40	0.15	6	9.0	354	287	193
2	33.6	19	7.26	286	1.02	40	0.15	6	9.7	382	350	235
1	42.4	19	8.15	321	1.27	50	0.18	7	10.9	429	445	299
1/0	53.5	19	9.14	360	1.27	50	0.18	7	12.3	484	560	376
2/0	67.4	19	10.26	404	1.27	50	0.18	7	13.3	524	694	466
3/0	85	19	11.53	454	1.27	50	0.18	7	14.5	571	868	583
4/0	107	19	12.95	510	1.27	50	0.18	7	15.9	626	1070	719
250	127	37	14.60	575	1.52	60	0.20	8	17.9	705	1267	851
300	152	37	16.00	630	1.52	60	0.20	8	19.6	772	1510	1015
350	177	37	17.30	681	1.52	60	0.20	8	20.9	823	1770	1189
400	203	37	18.49	728	1.52	60	0.20	8	22.2	874	2022	1359
500	253	37	20.65	813	1.52	60	0.20	8	24.2	953	2480	1667
600	304	61	22.68	893	1.78	70	0.23	9	26.8	1055	2999	2015

Driver			Maximum direct current electrical resistance at 20°C		Maximum permitted current carrying capacity. Ambient temperature 30ºC
Size	Nominal section	Number of strands	Maximum direct current electrical resistance at 20°C		60℃	75℃	90℃
AWG-kcmil	mm²		Ω/km	Ω/ltd	A	A	A
14	2.08	1	8.45	2.57	15	15	15
12	3.31	1	5.31	1.62	20	20	20
10	5.26	1	3.34	1.02	30	30	30
14	2.08	7	8.62	2.62	15	15	15
12	3.31	7	5.43	1.65	20	20	20
10	5.26	7	3.41	1.04	30	30	30
8	8.37	7	2.14	0.653	40	50	55
6	13.3	7	1.35	0.411	55	65	75
14	2.08	19	8.62	2.62	15	15	15
12	3.31	19	5.43	1.65	20	20	20
10	5.26	19	3.41	1.04	30	30	30
8	8.37	19	2.14	0.654	40	50	55
6	13.3	19	1.35	0.412	55	65	75
4	21.2	19	0.848	0.259	70	85	95
3	26.7	19	0.673	0.205	85	100	115
2	33.6	19	0.534	0.163	95	115	130
1	42.4	19	0.423	0.129	110	130	145
1/0	53.5	19	0.335	0.102	125	150	170
2/0	67.4	19	0.266	0.0811	145	175	195
3/0	85	19	0.211	0.0643	165	200	225
4/0	107	19	0.167	0.051	195	230	260
250	127	37	0.142	0.0432	215	255	290
300	152	37	0.118	0.036	240	285	320
350	177	37	0.101	0.0308	260	310	350
400	203	37	0.0885	0.027	280	335	380
500	253	37	0.0709	0.0216	320	380	430
600	304	61	0.059	0.018	350	420	475

Advantages of THHN/THWN-2 cable

Sustainability : Featuring a nylon sheath, it slows down the migration of PVC components, offering twice the lifespan of standard PVC cables, and having passed UL corrosion resistance and flexibility testing 2556.
Ignifugation : Compliance with UL combustion tests 83, UL 1685, UL 2556 VW-1 and FT2, effectively reducing fire risks, suitable for high security environments.
Respect for the environment : Low smoke and halogen free, no irritating gas during combustion, safe for the environment and health.
Convenient installation : Self-lubricating nylon and smooth surface reduce the risk of damage when passing through conduit, facilitating installation.
High temperature and corrosion resistance : Operating temperature up to 90°C, suitable for hot environments, wet or oily (like the THWN-2 which supports humid environments at 90°C).
Personalization service (ZMS CABLE) : Customizing lengths, specifications and sheath materials based on project needs, to adapt to specific environments (such as photovoltaic or energy storage systems), improving safety and profitability.