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A comment on From Edison’s Trunk, Direct Current Gets Another Look.

Re:From Edison’s Trunk, Direct Current Gets Another Look by Dylan16807 on Thursday November 17, 2011 @11:52PM (#3250648)
Nextek Power Systems, for example, has developed a system for delivering power via DC to lights and motion sensors through a building’s metal frame, instead of through wires.

How.. what? A frame can provide one side of a circuit, but it can't provide both. The FAQ on their site talks about wire gauge and length. What is this line talking about?

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Re:From Edison’s Trunk, Direct Current Gets Another Look by mindslight on Friday November 18, 2011 @01:15AM (#3250806)
you just need to realize this article tells you more about journalism than electricity. then it makes perfect sense.
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