TPPBbshng(C) - for laying in soils of all categories (except for mechanised laying in rocky soils), not subject to permafrost deformations, at group laying. TPZ - single-wire made of copper soft wire.
Insulation - polyethylene. Pairs are twisted into elementary bundles.
Core - of elementary bundles of different colours. Belt insulation - polyethylene or polyvinylchloride or polyamide or polyethylene terephthalate or paper-polyethylene tapes.
The use of dissimilar tapes is allowed. Shield: aluminium-polyethylene tape with thickness not more than 0,22 mm, laid longitudinally.
It is allowed to use aluminium tape not more than 0,2 mm thick without polyethylene underlayer. Under the screen winding (or longitudinally) 4 tinned copper wires are laid.
Protective sheath: polyethylene. Protective hose - polyvinylchloride plasticate not spreading combustion.
Protective cover - from two tapes of crepe paper, applied spirally with overlapping, two steel tapes, applied with a gap.
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