Bare conductors are extensively used for overhead distribution and transmission lines adjacent to ocean coastlines where there can be a problem of corrosion in the steel of an ACSR construction.

The inductive effect of the ACSR's steel core is eliminated, hence increasing the operating efficiency of the line.

Brief Description

This conductor is made from aluminium-magnesium silicon alloy of high electrical conductivity containing enough magnesium silicide to give it better mechanical properties after treatment. These conductors are generally made out of aluminium alloy 6201.
AAAC CONDUCTOR has a better corrosion resistance and better strength to weight ratio and improved electrical conductivity than ACSR CONDUCTOR on equal diameter basis.

Physical contents of alluminium alloy

Density - 2.70 kgm/dm3 at 20°C
Coefficient of Linear Expansion - 23 x 10-6 / °C
Resistivity - 0.0326 Ohms mm2/m at 20°C
Constant Mass Temperature Coefficient (a) - 0.00360/ °C
Material - Heat treated Al. Mg. Si. Alloy

Specification

All Aluminium Alloy Conductors ASTM B 399
AREA		Stranding and wire diameter	Approx. overall diameter	Weight	Nominal Breaking Load	Nom. DC resistance at 20 Deg.
Nominal	Actual	Stranding and wire diameter	Approx. overall diameter	Weight	Nominal Breaking Load	Nom. DC resistance at 20 Deg.
AWGorMCM	(mm2)	(mm)	(mm)	(kg/km)	(kN)	(ohm/km)
6	13.3	7/1.554	4.67	37	4.22	2.5199
4	21.15	1/1.961	5.89	58	6.71	1.5824
2	33.63	7/2.474	7.42	93	10.68	0.9942
1/0	53.48	7/3.119	9.36	148	16.97	0.6256
2/0	67.42	7/3.503	10.51	186	20.52	0.4959

3/0	85.03	7/3.932	11.8	234	25.86	0.3936
4/0	107.23	7/4.417	13.26	296	32.63	0.3119
250	126.66	19/2.913	14.57	349	38.93	0.2642
300	152.1	19/63.193	15.97	419	46.77	0.2199
350	177.35	19/3.447	17.24	489	52.25	0.1887

400	202.71	19/3.686	18.43	559	59.74	0.1650
450	228	19/3.909	19.55	629	67.19	0.1467
500	253.35	19/4.120	20.6	698	74.64	0.1321
550	278.6	37/3.096	21.67	768	83.80	0.1202
600	303.8	37/3.233	22.63	838	91.38	0.1102

650	329.25	37/3.366	23.56	908	97.94	0.1016
700	354.55	37/3.493	24.45	978	102.20	0.0944
750	380.2	37/3.617	25.32	1049	109.60	0.0880
800	405.15	37/3.734	26.14	1117	116.80	0.0826
900	456.16	37/3.962	27.73	1258	131.50	0.0733
1000	506.71	37/4.176	29.23	1399	146.10	0.0660

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