C102/C110 Copper Conductor Wire

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Conductor Wire

Copper is the “standard” metal used for electrical conductors. Copper has extremely high electrical conductivity, surpassed only by pure silver and it has excellent tensile, solderability and corrosion characteristics.

C102 is an oxygen free (OF) copper that has better drawing and resistance to hydrogen embrittlement than C110 (ETP). OF copper contains less dissolved oxygen than ETP, which gives OF its performance advantage. In most applications, ETP is an acceptable conductor material and is more economical than OF copper.

Both OF and ETP copper conductors are available bare or plated with silver, nickel or tin.

English UnitsMetric Units

Physical Properties

Soft
Tensile	32 ksi
Elongation	10 - 20%
Electrical Conductivity	100% IACS* @ 68°F
Electrical Resistivity	10.37 cir mil ohm/ft @ 68°F
Melting Point	1981°F
Density	0.323 lbs/in³
Thermal Coefficient of Resistance	0.00218 Per °F

19-Strand Unilay Constructions

Nickel Plated Copper - Soft (50 micro-inch nickel thickness)
AWG	Const	Diameter (inch)		Resist (Ω/mft)	Weight (lb/mft)
AWG	Const	Min	Max	Max	Max
18	19/30	0.0462	0.0480	5.97	5.94
20	19/32	0.0368	0.0387	9.52	3.86
22	19/34	0.0289	0.307	15.4	2.43
24	19/36	0.0228	0.0247	24.7	1.57
26	19/38	0.0182	0.0200	40.0	1.037
28	19/40	0.0140	0.0159	67.5	0.648

Silver Plated Copper - Soft (40 micro-inch silver thickness)
AWG	Const	Diameter (inch)		Resist (Ω/mft)	Weight (lb/mft)
AWG	Const	Min	Max	Max	Max
18	19/30	0.0462	0.0471	5.79	5.73
20	19/32	0.0368	0.0377	9.19	3.69
22	19/34	0.0289	0.0298	15.0	2.32
24	19/36	0.0228	0.0238	23.9	1.46
26	19/38	0.0182	0.0191	37.7	0.948
28	19/40	0.0140	0.0149	63.7	0.578
30	19/42	0.0112	0.0121	99.0	0.381
32	19/44⁽¹⁾	0.0094	0.0104	154.2	0.257
(1) True Concentric

7-Strand Constructions

Nickel Plated Copper - Soft (50 micro-inch nickel thickness)
AWG	Const	Diameter (inch)		Resist (Ω/mft)	Weight (lb/mft)
AWG	Const	Min	Max	Max	Max
22	7/30	0.0293	0.0350	15.8	2.19
24	7/32	0.0234	0.0243	25.0	1.41
26	7/34	0.0183	0.0193	40.7	0.884
28	7/36	0.0145	0.0154	65.1	0.566
30	7/38	0.0115	0.0124	105.0	0.368
32	7/40	0.00828	0.00947	204.0	0.214

Silver Plated Copper - Soft (40 micro-inch silver thickness)
AWG	Const	Diameter (inch)		Resist (Ω/mft)	Weight (lb/mft)
AWG	Const	Min	Max	Max	Max
22	7/30	0.0293	0.0300	15.5	2.15
24	7/32	0.0234	0.0241	24.2	1.38
26	7/34	0.0183	0.019	39.4	0.861
28	7/36	0.0145	0.0151	63.0	0.547
30	7/38	0.0115	0.0122	99.0	0.353
32	7/40	0.00887	0.0095	168.0	0.216
34	7/42	0.0071	0.00772	262.0	0.143
36	7/44	0.00562	0.00624	420.0	0.0943
38	7/46	0.00435	0.00496	696.0	0.0594

Single End Construction

Nickel Plated Copper - Soft (50 micro-inch nickel thickness)
AWG	STD Plate %	Diameter (inch)			Resist (Ω/mft)	Weight (lb/mft)	Length (ft/lb)
AWG	STD Plate %	Nom	Min	Max	Max	Max	Nom
30	2	0.0101	0.0099	0.0103	110.2	0.321	3,304
31	4	0.0090	0.0088	0.0092	142.5	0.256	4,171
32	4	0.0081	0.0079	0.0083	176.8	0.208	5,162
33	4	0.0071	0.0069	0.0073	231.7	0.161	6,742
34	4	0.0064	0.0062	0.0066	287.0	0.132	8,324
35	4	0.0057	0.0055	0.0059	364.7	0.105	10,534
36	4	0.0051	0.0049	0.0053	459.5	0.0850	13,214
37	7	0.0046	0.0044	0.0048	588.7	0.0697	16,314
38	7	0.0041	0.0039	0.0043	749.3	0.0560	20,648
39	7	0.0036	0.0034	0.0038	985.9	0.0437	26,968
40	7	0.0032	0.0030	0.0034	1,266	0.0350	34,377

Silver Plated Copper - Soft (40 micro-inch silver thickness)
AWG	STD Plate %	Diameter (inch)			Resist (Ω/mft)	Weight (lb/mft)	Length (ft/lb)
AWG	STD Plate %	Nom	Min	Max	Max	Max	Nom
30	2	0.0100	0.0099	0.0101	105.8	0.310	3,293
31	2.5	0.0089	0.0088	0.0090	133.9	0.246	4,155
32	2.5	0.0080	0.0079	0.0081	166.2	0.199	5,142
33	3	0.0070	0.0069	0.0071	217.8	0.153	6,711
34	3	0.0063	0.0062	0.0064	269.8	0.125	8,285
35	4	0.0056	0.0055	0.0057	342.8	0.0990	10,470
36	4	0.0050	0.0049	0.0051	431.9	0.0792	13,133
37	5	0.0045	0.0044	0.0046	535.7	0.0645	16,189
38	5	0.0040	0.0039	0.0041	681.9	0.0513	20,489
39	6.1	0.0035	0.0034	0.0036	897.1	0.0396	26,716
40	6.1	0.0031	0.0030	0.0032	1,152	0.0313	34,055
41	8	0.0028	0.0027	0.0029	1,423	0.0258	41,621
42	8	0.0025	0.0024	0.0026	1,801	0.0207	52,209
43	10	0.0022	0.0021	0.0023	2,352	0.0163	67,210
44	10	0.0020	0.0019	0.0021	2,873	0.0136	81,324
45⁽¹⁾	10⁽²⁾	0.00178	0.00166	0.00190	3,764	0.0107	104,688
46⁽¹⁾	10⁽²⁾	0.00157	0.00147	0.00167	4,799	0.0086	131,560
47⁽¹⁾	10⁽²⁾	0.00140	0.00130	0.00150	6,232	0.0069	167,052
48⁽¹⁾	10⁽²⁾	0.00124	0.00114	0.00134	7,980	0.0056	209,913
49⁽¹⁾	10⁽²⁾	0.00111	0.00101	0.00121	10,167	0.0045	261,961
50⁽¹⁾	10⁽²⁾	0.00099	0.00089	0.00109	13,212	0.0037	331,993
(1) These single end sizes will be hard temper (2) These single end sizes will not have 40 micro-inches of silver

Physical Properties

Soft
Tensile	221 MPa
Elongation	10 - 20%
Electrical Conductivity	0.580 megmho/cm @ 20°C
Electrical Resistivity	1.724 microhm-cm @ 20°C
Melting Point	1083°C
Density	8.94 g/cm³
Thermal Coefficient of Resistance	0.00393 Per °C

19-Strand Unilay Constructions

Nickel Plated Copper - Soft (50 micro-inch nickel thickness)
AWG	Const	Diameter (mm)		ResistANCE (Ω/km)	Weight (kg/km)
AWG	Const	Min	Max	Max	Max
18	19/30	1.173	1.219	19.6	8.84
20	19/32	0.935	0.983	31.2	5.74
22	19/34	0.734	0.798	50.5	3.62
24	19/36	0.579	0.627	81.0	2.34
26	19/38	0.462	0.508	131.2	1.54
28	19/40	0.356	0.404	221.5	0.964

Silver Plated Copper - Soft (40 micro-inch silver thickness)
AWG	Const	Diameter (mm)		Resistance (Ω/km)	Weight (kg/km)
AWG	Const	Min	Max	Max	Max
18	19/30	1.173	1.196	19.0	8.53
20	19/32	0.935	0.958	30.2	5.49
22	19/34	0.734	0.757	49.2	3.45
24	19/36	0.579	0.605	78.4	2.17
26	19/38	0.462	0.485	123.7	1.41
28	19/40	0.356	0.378	209.0	0.860
30	19/42	0.284	0.307	324.8	0.567
32	19/44⁽¹⁾	0.239	0.264	505.9	0.382
(1) True Concentric

7-Strand Constructions

Nickel Plated Copper - Soft (50 micro-inch nickel thickness)
AWG	Const	Diameter (mm)		Resistance (Ω/km)	Weight (kg/km)
AWG	Const	Min	Max	Max	Max
22	7/30	0.744	0.889	51.8	3.26
24	7/32	0.594	0.617	82.0	2.10
26	7/34	0.465	0.490	133.5	1.32
28	7/36	0.368	0.391	213.6	0.842
30	7/38	0.292	0.315	344.5	0.548
32	7/40	0.210	0.241	669.3	0.318

Silver Plated Copper - Soft (40 micro-inch silver thickness)
AWG	Const	Diameter (mm)		Resistance (Ω/km)	Weight (kg/km)
AWG	Const	Min	Max	Max	Max
22	7/30	0.744	0.762	50.9	3.20
24	7/32	0.594	0.612	79.4	2.05
26	7/34	0.465	0.483	129.3	1.28
28	7/36	0.368	0.384	206.7	0.814
30	7/38	0.292	0.310	324.8	0.525
32	7/40	0.225	0.241	551.2	0.321
34	7/42	0.180	0.196	859.6	0.213
36	7/44	0.143	0.158	1,378	0.140
38	7/46	0.110	0.126	2,283	0.088

Single End Constructions

Nickel Plated Copper - Soft (50 micro-inch nickel thickness)
AWG	STD Plate %	Diameter (mm)		Resist (Ω/km)	Weight (kg/km)	Length (m/kg)
AWG	STD Plate %	Min	Max	Max	Max	Nom
30	2	0.251	0.262	361.5	0.478	2,220
31	4	0.224	0.234	467.5	0.381	2,803
32	4	0.201	0.211	580.0	0.310	3,469
33	4	0.175	0.185	760.2	0.240	4,530
34	4	0.157	0.168	941.6	0.196	5,593
35	4	0.140	0.150	1,197	0.156	7,078
36	4	0.124	0.135	1,508	0.126	8,879
37	7	0.112	0.122	1,931	0.1037	10,962
38	7	0.099	0.109	2,458	0.0833	13,874
39	7	0.086	0.097	3,235	0.0650	18,121
40	7	0.076	0.086	4,153	0.0521	23,100

Silver Plated Copper - Soft (40 micro-inch silver thickness)
AWG	STD Plate %	Diameter (mm)		Resist (Ω/km)	Weight (kg/km)	Length (m/kg)
AWG	STD Plate %	Min	Max	Max	Max	Nom
30	2	0.251	0.257	347.1	0.461	2,213
31	2.5	0.224	0.229	439.3	0.366	2,792
32	2.5	0.201	0.206	545.3	0.296	3,455
33	3	0.175	0.180	714.6	0.228	4,509
34	3	0.157	0.163	885.2	0.186	5,567
35	4	0.140	0.145	1,125	0.147	7,035
36	4	0.124	0.130	1,417	0.118	8,825
37	5	0.112	0.117	1,758	0.0960	10,878
38	5	0.099	0.104	2,237	0.0763	13,768
39	6.1	0.086	0.091	2,943	0.0589	17,952
40	6.1	0.076	0.081	3,779	0.0466	22,883
41	8	0.069	0.074	4,669	0.0384	27,967
42	8	0.061	0.066	5,909	0.0308	35,082
43	10	0.053	0.058	7,716	0.0243	45,162
44	10	0.048	0.053	9,426	0.0202	54,646
45⁽¹⁾	10⁽²⁾	0.042	0.048	12,349	0.0159	70,345
46⁽¹⁾	10⁽²⁾	0.037	0.042	15,745	0.0128	88,402
47⁽¹⁾	10⁽²⁾	0.033	0.038	20,446	0.0103	112,251
48⁽¹⁾	10⁽²⁾	0.029	0.034	26,181	0.0083	141,052
49⁽¹⁾	10⁽²⁾	0.026	0.031	33,356	0.0067	176,025
50⁽¹⁾	10⁽²⁾	0.023	0.028	43,346	0.0055	223,084
(1) These single end sizes will be hard temper (2) These single end sizes will not have 40 micro-inches of silver

For a full size version of product specifications, including chemical composition in both US and Metric units, please download the PDF.

Specifications

ASTM B250
ASTM B298
ASTM B3
ASTM B33
ASTM B355
ASTM B8
ASTM B286
NEMA WC67

Conversion Factors
Metric Tensile Strengths

kg/mm² = KSI x .7031
N/mm² = KSI x 6.895