Electric and communication cables

Details Electric and communication cables Electric and communication cables

1992-07-23

1994-05-10

Nimmo, Morris H.

Electricity: conductors and insulators

Conduits, cables or conductors

Insulated

174105SC, 174106SC, 174107, 174116, 174121SR, H01B 734

Patent

active

053109643

ABSTRACT:
A cable comprising a core enclosed in an external sheath of a char-forming low-smoke-and-fume composition is characterized by a tape of flexible mineral material, preferably a woven glass-fiber tape, wrapped round the core and by an adhesive bonding the tape to the sheath. Hot-melt adhesives based on ethylene/vinyl acetate copolymers with tackifier resins are suitable. By bonding the sheath to the underlying tape, retention of the charred remains of the sheath under fire conditions is considerably improved with consequent improvements in flame retardance, smoke levels and fire survival.

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