When constructing the Empire State Building in 1930, engineers found that the heavy non-armored electrical cable installed in vertical raceways or risers imposed excessive strain on terminations, panels, or other connected devices. In all, electricians installed a staggering 2,500,000 feet of electrical wire to convey the 40,000,000 kilowatt hours used by the building and its tenants annually. To answer this challenge of how to safely install vertical conduit raceways in a 102-story
Hanging Tough with Vertical Cable Supports
These devices mean the difference between being connected or disconnected in longer vertical raceways.