Trans Bay Cable
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Operation

TBC has convertor stations in both Pittsburg and San Francisco. Power is used by consumers in the Alternating Current (AC) form. Because AC power cannot travel efficiently over long distances while buried it must be converted to the Direct Current (DC) form in Pittsburg, and then back to AC once it reaches San Francisco.

It is important to note that the Pittsburg Substation receives power through transmission lines from many other power plants in California and the Western U.S. Because of the diversity of its energy sources, it is impossible to identify the specific sources of power the Cable will receive, but it does include energy from renewable sources.