A key part of electrical power distribution is bus duct. Also called busway, bus duct provides an alternative means of conducting electricity. Bus duct is used in commercial and industrial settings to conduct electricity to power cables or cable bus. Structurally, a bus duct is a sheet metal duct containing either aluminum or copper busbars (metallic strips or bars that conduct a substantial electrical current) in a grounded metal enclosure. Bus duct is easy to maintain and flexible, helping to accommodate changing load requirements.
According to Electrical Construction & Maintenance Magazine, an online resource for the electrical design and maintenance industry, busway was first introduced in 1932 for use in the automotive industry. Since then this product has grown and now serves many other industries.