ELECTRICAL COLD-RESISTANT FLAME-RETARDING CABLE, ESSENTIALLY EXPLOSION- AND FLAME-PROOF, FOR SPARK-PROOF CIRCUITS Russian patent published in 2014 - IPC H01B7/04 

FIELD: electricity.

SUBSTANCE: invention is related to design of electrical multi-conductor cold-resistant flame-retarding cable intended for hardwiring between equipment at industrial sites, including explosion dangerous areas of all categories where different explosion protection methods are used. The cable comprises the core consisting of at least one isolated single-sire or multi-wire copper-tinned conductor (1), or at least a group of the above conductors twisted into a pair or a triplet or quadruple, a filler (3) placed on top of the core and moisture-proof sheath (6). At that the moisture-proof sheath is made of at least two extruded polymer layers of special-purpose polyvinylchloride soft cable compound with low quantity of smoke and oxygen index equal to at least 35, with braiding or sheathing made of cords (4, 5) and laid between them with density of at least 10% and 50% at most, at that in gaps between cords the above layers are welded to each other, and isolation and filler are made of low-flammable material.

EFFECT: cables may be used at minimum environment temperature up to minus 60°C with compliance with flame-retarding and low smoke requirements to grouped laying thus ensuring production of cable lines without division into cables for internal and external laying.

27 cl, 1 dwg