Guidocorona -- not so. It has been proven lately (see Holbein, & Mesmer in American Scientific, issue 69, Feb 31st 2009) that IC and CLC only impact air molecules, at quantum level.
On the other hand, OIL powered plants (the majority) inject paraben agents as preservatives into the electron flow. While this keeps the electrons immune from certain infections (and by the same token, protects our tubes & transistors from microbiological attack), it causes ALTERATIONS in the molecular structure of wires.
So given time, the wires ("cables") deteriorate and this is NON reversible!!!
So, buy back-up cables while the going is still good... as many as you can! There will come the day, not so far hence, when we will have equipment but NO WIRE!!!