THHN Wire Application

The copper conductors type THHN are used for power and lighting circuits in industrial, commercial and residential facilities, they are specially suitable for special installations through difficult ducts and to be used in abrasive zones or polluted with oils, grease, gasoline, etc. and other corrosive chemical substances as paints, solvents, etc., This type of conductor when it is used as THHN it can be used in dry places with maximum temperature of operation of 90 ºC. Regarding the voltage of service, for all the applications, it is of 600 V.

Standard :

THHN Wire Standards:

The copper conductors type THHN meets the following specifications and standards:
• ASTM B-3:Copper Annealed or Soft Wires.
• ASTM B-8:Copper Stranded Conductors in Concentric Layers, Hard, Semi-hard or Soft.
• UL - 83:Wires and Cables Insulated with Thermoplastic Material.
• NEMA WC-5:Wires and Cables Insulated with Thermoplastic Material (ICEA S-61-402) for Transmission and Distribution of Electric Power.

Construction :

THHN Wire Construction

The conductors type THHN or THWN-2 can be solid or stranded and they are built with soft temper copper, they are also insulated with an uniform layer of Chloride of Polyvinyl (PVC) thermoplastic material resistant to the moisture and the heat, over which it is applied a protector coating of Nylon or Polyamide. They can be supplied in varied colors according to their size and with different packaging.

Copper Conductor
Insulation of Thermoplastic Material, PVC 600V. - 90 °C
Nylon Jacket

Parameter :

SIZE OF CONDUCTOR		No.&Nominal Diameter of Wire	Wall Thickness		Approximate Overall Diameter	Minimum Insulation Resistance	*Ampacity		Cable Nominal Weight
MM	Approximate AWG	MM	MM		MM	M-Ohm-Km	90℃ wet	90 ℃ dry	KG/KM
Solid			PVC	Nylon
1.6mm	14	1x1.60mm	0.4	0.10	2.60	130	35	35	22.62
2.0 mm	12	1x2.00mm	0.4	0.10	3.00	110	40	40	33.57
2.6 mm	10	1x2.60mm	0.5	0.10	3.80	120	55	55	55.78
3.2 mm	8	1x3.20mm	0.8	0.13	5.06	120	75	75	88.33
Stranded
2.0mm2	14/7	7X0.60mm	0.4	0.10	2.80	130	30	35	23.51
3.5mm2	12/7	7x0.80mm	0.4	0.10	3.40	110	35	40	39.12
5.5mm2	10/7	7x1.00mm	0.5	0.10	4.20	120	50	55	60.56
8.0mm2	8/7	7x1.20mm	0.8	0.13	5.46	120	65	75	91.95
14mm2	6/7	7x1.60mm	0.8	0.13	6.66	100	95	105	151.77
22mm2	4/7	7x2.00mm	1.0	0.15	8.30	100	130	140	236.65
30mm2	2/7	7x2.30mm	1.0	0.15	9.20	100	160	170	306.50
38mm2	1-19	19x1.60mm	1.3	0.18	10.96	100	185	195	409.82
50mm2	1/0-19	19x1.80mm	1.3	0.18	11.96	100	220	235	509.05
60mm2	2/0-19	19x2.00mm	1.3	0.18	12.96	80	250	260	618.96
80mm2	3/0-19	19x2.30mm	1.3	0.18	14.96	80	300	320	804.44
100mm2	4/0-19	19x2.60mm	1.3	0.18	15.96	80	355	370	1013.94
125mm2	250MCM	37x2.10mm	1.6	0.18	18.26	80	400	420	1296.37
150mm2	300MCM	37x2.30mm	1.6	0.20	19.7	80	440	475	1542.02
	350MCM	37x2.47mm	1.6	0.20	20.90	60	505	523	1783.07
200mm2	400MCM	37x2.60mm	1.6	0.20	21.80	60	540	570	1946.72
	500MCM	37x2.95mm	1.6	0.20	24.25	60	620	655	2486.02
250mm2	500MCM	61x2.30mm	1.6	0.20	24.30	60	620	655	2437.34
	600MCM	61x2.52mm	1.8	0.23	26.76	60	690	710	2995.93
325mm2	650MCM	61x2.60mm	1.8	0.23	27.46	60	720	770	3191.58
	750MCM	61x2.82mm	1.8	0.23	29.36	60	785	820	3719.63
400mm2	800MCM	61x2.90mm	1.8	0.23	30.16	60	810	875	3927.55
500mm2	1000MCM	61x3.20mm	1.8	0.23	32.86	60	930	995	4750.91