aluminium tube basbar

It's a tubular aluminum bus conductor. 4" IPS (Iron Pipe Size) designates an aluminum pipe that is 4.5" outside diameter x some wall thickness. The EH designation means Extra Heavy (which at least in the U.S. would mean schedule 80). The two standard types commonly used for bus conductors are schedule 40 with a wall thickness of 0.247" and schedule 80 which has a wall thickness of 0.337". The two commonly used aluminum alloys are 6063-T6 and 6061-T6. They differ in mechanical strength and electrical conductivity; 6063-T6 has a typical conductivity of 53% IACS (International Annealed Copper Standard) while 6061-T6 is 43%.

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