ThinkGood,

that was what gave me the idea. If it's used in America, it's probably the cheapest way of doing things. (Don't get me wrong: Americans are good at finding cheap solutions)

Paul,

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Why only #14 / 2.5 mm? Are you thinking about a service limited to 15A or so?

More like 1A and 2.5A services. Of course, you'd market them as 200W and 500W services. Sounds better. [Linked Image]

David UK,

am afraid it might. But a copper conductor would be even thinner.

How do phone wires work?