Cables for signalling and interlocking not spreading combustion, with copper conductors, with water-blocking materials, with a screen of aluminium or aluminopolymer tape under the sheath, with insulation and sheath of halogen-free polymer composition, designed for electrical installations of signalling, centralisation and interlocking, fire alarms and automatics at rated voltage of 380 V AC 50 Hz or 700 V DC.
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