Des Moines, IA Crew upgrades switchgear at National Distribution Center.

united states postal serviceCommonwealth’s scope of work consists of the replacement of the 15KV primary switchgear, along with the 5KV substation, and one 480 volt unit substation, which are located on the third floor of the distribution center.  There were also three additional 480 volt unit substations located in separate penthouses on the roof that were replaced.

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