Expansion of an existing, operating data center included two new 12KV services from SVP, three new 2MW generators, sixteen new RTUs, eight new 750KVA UPS, thirty-two 400A ASTS, one 1000-ton chiller, upgrade and replacement of the existing control systems, installation of new paralleling switchgear, and upgrading of existing paralleling switchgear. All work was done without interrupting customer power or cooling in a 24/7 operating facility.