After stripping off the end of the outer insulation ('estremità spellata'), it is very common roll the exposed end of the tubular braided screen back down the outside of the cable prior to the application of a clamp or some similar device the make good electrical connection with the screen. A thin metal tube may be slid over the outer insulation first, so the screen is held between this tube and the clamp, thus offering better contact..

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Note added at 1 hr (2008-06-05 18:41:04 GMT)
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Re asker's notes below: Yes, we often refer to 'rolling back' the braid. It's valid jargon.

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Note added at 1 hr (2008-06-05 18:43:41 GMT)
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'folding back' would suggest that the braided screen is unravelled and then the strands are folded back straight along the sheath, whereas 'rolling back' would suggest that the braid maintains it's tubular shape (and screening performance) - an operation similar to turning a sock inside-out.