THW/TW Copper Electrical Wire Application

The copper conductors type THW are used for power and lighting circuits in industrial, commercial and residential facilities where it is required of more security, just as it is specified in the National Electrical Code. This type of conductor can be used in dry and wet places; its maximum temperature of operation is of 75 ºC and its voltage of service for all the applications it is 600 V.

STANDARD :

THW/TW Copper Electrical Wire 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 :

The conductors type THW 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. They can be supplied in varied colors according to their size and with different packaging.

Conductor	Annealed copper wire (Solid, Stranded Circular)
Insulation	PVC
Available Color	Black, White, Red, Green, Yellow, Blue, Green-Yellow or as require

PARAMETER :

THW/TW Copper Electrical Wire Parameter

Size	Cross Section Area	Number of Strands	Insulation Thickness		External Diameter		Total Weight		Ampacity for 1 Conductor in Free Air	Ampacity for 3 Conductors in Conduit
AWG OR	mm2	No	mm.	Mils	mm.	in	Kg/Km	Ib/kft	Amp.	Amp.
MCM	mm2	No	mm.	Mils	mm.	in	Kg/Km	Ib/kft	Amp.	Amp.
14	2.08	Solid	0.76	30	3.15	0.124	26	17.8	20	15
12	3.31	Solid	0.76	30	3.57	0.141	39	26.5	25	20
10	5.26	Solid	0.76	30	4.11	0.162	58	39.4	35	30
14	2.08	7	0.76	30	3.36	0.132	21	19.4	20	15
12	3.31	7	0.76	30	3.84	0.151	41	28.3	25	20
10	5.26	7	0.76	30	4.45	0.175	61	42.1	35	30
8	8.37	7	1.14	45	5.98	0.232	103	69.2	50	40
6	13.30	7	1.52	60	7.7	0.298	165	112	65	55
4	21.15	7	1.52	60	8.92	0.345	247	167	85	70
2	33.63	7	1.52	60	10.4	0.403	374	252	115	95
1	42.41	19	2.03	80	12.5	0.482	485	326	130	110
1/0	53.48	19	2.03	80	13.5	0.522	596	401	150	125
2/0	67.43	19	2.03	80	14.7	0.565	736	494	175	145
3/0	85.03	19	2.03	80	16	0.616	910	611	200	165
4/0	107.20	19	2.03	80	17.4	0.672	1127	757	230	195
250	126.70	37	2.41	95	19.3	0.748	1349	903	255	215
300	152.00	37	2.41	95	28.8	0.801	1599	1069	285	240
350	177.30	37	2.41	95	22	0.851	1844	1235	310	260
400	202.70	37	2.41	95	23.2	0.896	2092	1400	335	280
500	253.40	37	2.41	95	25.4	0.979	2582	1728	380	320
600	304.00	61	2.79	110	28.2	1.09	3099	2081	420	355
700	354.70	61	2.79	110	30	1.15	3582	2407	460	385
750	380.00	61	2.79	110	30.9	1.22	3827	2571	475	355