A 40 year old building with much of the original mechanical and electrical infrastructure. A 40 year old 4000 amp, 480 volt aluminum electrical buss duct, which had been modified and "tapped" often during its life, with much of the work done violating equipment specifications.
With the old materials such as buss insulation gradually deteriorating, the duct expanding and contracting over the years, the fact aluminum was used during the initial installation to either save money or test a new technology vision - it all becomes a risk. A risk of buss failure, or at worst a buss failing to the point it results in a massive electrical explosion.
Sound extreme? Now add a couple of additional factors. The building is a mixed use-telecom carrier hotel, with additional space used for commercial collocation and standard commercial office space. This narrows it down to most of the carrier hotel facilities in the US and Europe. Old buildings, converted to mixed-use carrier hotel and collocation facilities, due mainly to an abundance of vacant space during the mid-1990s, and a need for telecom interconnection space following the Telecommunications Act of 1996.