Aluminum Conductor Characteristics

Characteristics of all-aluminum conductors (AAC). Lookup table and calculator for aluminum conductor properties including resistance, breaking strength, weight, and electrical characteristics.

AWG	kcmil	Strands	Diameter (in)	GMR (ft)	Resistance (ohm/1000 ft)	Breaking Strength (lb)	Weight (lb/1000 ft)
6	26.2	7	0.184	0.0056	0.659	563	24.6
4	41.7	7	0.232	0.007	0.414	881	39.1
2	66.4	7	0.292	0.0088	0.26	1350	62.2
1	83.7	7	0.328	0.0099	0.207	1640	78.4
1/0	106	7	0.368	0.0111	0.164	1990	98.9
2/0	133	7	0.414	0.0125	0.13	2510	125
3/0	168	7	0.464	0.014	0.103	3040	157
4/0	212	7	0.522	0.0158	0.0817	3830	198
250	250	7	0.567	0.0171	0.0691	4520	234
250	250	19	0.574	0.0181	0.0693	4660	234
267	267	7	0.586	0.0177	0.0647	4830	250
267	267	19	0.593	0.0187	0.0648	4970	250
300	300	19	0.629	0.0198	0.0575	5480	281
336	336	19	0.666	0.021	0.0513	6150	316
350	350	19	0.679	0.0214	0.0494	6390	328
398	398	19	0.724	0.0228	0.0435	7110	373
450	450	19	0.769	0.0243	0.0384	7890	422
477	477	19	0.792	0.025	0.0363	8360	447
477	477	37	0.795	0.0254	0.0363	8690	447
500	500	19	0.811	0.0256	0.0346	8760	469
500	500	37	0.813	0.026	0.0346	9110	468
557	557	19	0.856	0.027	0.0311	9750	521
557	557	37	0.858	0.0275	0.0311	9940	521
600	600	37	0.891	0.0285	0.0288	10700	562
636	636	37	0.918	0.0294	0.0272	11400	596
650	650	37	0.928	0.0297	0.0266	11600	610
700	700	37	0.963	0.0308	0.0247	12500	656
700	700	61	0.964	0.031	0.0247	12900	656
716	716	37	0.974	0.0312	0.0242	12800	671
716	716	61	0.975	0.0314	0.0242	13100	671
750	750	37	0.997	0.0319	0.023	13100	703
750	750	61	0.998	0.0321	0.023	13500	703
795	795	37	1.03	0.0328	0.0217	13900	745
795	795	61	1.03	0.0331	0.0217	14300	746
875	875	37	1.08	0.0344	0.0198	15000	820
875	875	61	1.08	0.0347	0.0198	15800	821
900	900	37	1.09	0.0349	0.0192	15400	844
900	900	61	1.09	0.0352	0.0192	15900	844
954	954	37	1.12	0.036	0.0181	16400	895
954	954	61	1.13	0.0362	0.0181	16900	895
1000	1000	37	1.15	0.0368	0.0173	17200	937
1000	1000	61	1.15	0.0371	0.0173	17700	937

Calculator

Inputs

Conductor Length (ft)

Resistance (per 1000 ft) (ohm)

Current (A)

Weight (per 1000 ft) (lb)

Breaking Strength (per conductor) (lb)

Results

Total Resistance-- ohm

Voltage Drop-- V

Power Loss-- W

Total Conductor Weight-- lb

Total Breaking Strength-- lb

Aluminum Conductor Reference Information

Key Definitions

GMR (Geometric Mean Radius) - Quantifies a conductor's internal inductance. By definition, the GMR is the radius of an infinitely thin tube having the same internal inductance as the conductor out to a one-foot radius. GMR is often expressed in feet to ease calculations with distances measured in feet. Note that the GMR is less than the actual conductor radius.

kcmil (Thousand Circular Mils) - A unit of conductor cross-sectional area where:

1 kcmil = 1000 cmil
1 kcmil = 785.4×10⁻⁶ in²
1 kcmil = 0.5067 mm²

Unit Conversions

1 ft = 0.3048 m
Resistance values are referenced at 60 Hz AC at 25°C

AAC Advantages

Lightweight compared to copper
Lower cost than copper
Suitable for transmission and distribution lines
Available in multiple strand configurations for different breaking strength requirements