Nominal dimensions and area for compact aluminum building wire

Tables > Wires and Cables > Dimensions and Sizes > Compact Aluminum Building

Jump to: Description Table Notes Copyright Projects

Bare Conductor			Types THW and THHW		Type THHN		Type XHHW
Size AWG or kcmil	Number of Strands	Diam. Inches	Approx. Diam. Inches	Approx. Area Sq. In.	Approx. Diam. Inches	Approx. Area Sq. In.	Approx. Diam. Inches	Approx. Area Sq. Inches
8	7	0.134	0.255	0.051	-	-	0.224	0.0394
6	7	0.169	0.29	0.066	0.24	0.0452	0.26	0.053
4	7	0.213	0.335	0.0881	0.305	0.073	0.305	0.073
2	7	0.268	0.39	0.1194	0.36	0.1017	0.36	0.1017
1	19	0.299	0.465	0.1698	0.415	0.1352	0.415	0.1352
1/0	19	0.336	0.5	0.1963	0.45	0.159	0.45	0.159
2/0	19	0.376	0.545	0.2332	0.495	0.1924	0.49	0.1885
3/0	19	0.423	0.59	0.2733	0.54	0.229	0.54	0.229
4/0	19	0.475	0.645	0.3267	0.595	0.278	0.59	0.2733
250	37	0.52	0.725	0.4128	0.67	0.3525	0.66	0.3421
300	37	0.57	0.775	0.4717	0.72	0.4071	0.715	0.4015
350	37	0.616	0.82	0.5281	0.77	0.4656	0.76	0.4536
400	37	0.659	0.865	0.5876	0.815	0.5216	0.8	0.5026
500	37	0.736	0.94	0.6939	0.885	0.6151	0.88	0.6082
600	61	0.813	1.05	0.8659	0.985	0.762	0.98	0.7542
700	61	0.877	1.11	0.9676	1.05	0.8659	1.05	0.8659
750	61	0.908	1.15	1.0386	1.075	0.9076	1.09	0.9331
1000	61	1.06	1.285	1.2968	1.255	1.237	1.23	1.1882

*Dimensions are from industry sources.
Reprinted with permission from NFPA 70-1999, the National Electrical Code®, Copyright 1998, National Fire Protection Association, Quincy, MA 02269. This reprinted material is not the referenced subject which is represented only by the Standard in its entirety.