Instrumentation Cables (Power Supply and Signal Cables) a) Contractor shall include in his scope the supply and laying, of instrumentation signal & instrument power supply cables and associated civil/mechanical work required for completing the system. b) Cables shall be capable of satisfactorily withstanding without damage, transportation to site, installation at site, and operation under normal and short circuit conditions of the various systems to which the respective cables are connected when operating under the climatic conditions prevailing at the site as indicated in this specification. Cables shall be capable of operating satisfactorily under a power supply system voltage variation of 15%, and frequency variation of 5%. c) Cable joints in instrument signals and instrument power supply cables shall not be permitted. d) Cables shall be directly laid on trays, in trenches, conduits, and ducts and directly buried in the ground as necessary. e) The Contractor shall also supply the necessary materials such as junction boxes, glands, lugs etc required for termination of cables. Cables for Digital Signals (D.C.) and D.C. Power Supply to Instruments 660V/1100 V grade multicore cables, multistranded high conductivity annealed 1.0 sq.mm. stranded tinned copper conductor, extruded PVC insulated, overall shielded with aluminium Mylar tape, ATC drain wire run continuously in contact with aluminium tape, inner sheathed with extruded PVC, armoured with galvanised steel wire overall sheathed with extruded PVC conforming to IS: 1554 & IEC: 189 Part II. Cables for analog signals660 V/1100 V annealed, tinned, high conductivity 1.0 sq mm stranded copper conductor extruded PVC insulated two cores twisted into pair, laid up collectively, individual pair shielded and overall shielded with aluminium Mylar tape, ATC drain wire run continuously in contact with aluminium side of the tape, inner sheathed with extruded PVC, armoured with galvanised steel wire, overall sheathed with extruded PVC conforming to IS: 1554 & IEC: 189 Part ll.Power supply cablesCables shall be rated for 1100 V and shall conform to the latest edition of IS: 1554. Cable shall be insulated with extruded PVC type 'A. The inner sheath over laid up covers and outer sheath over the armour shall be of extruded PVC compound type ST1. 230 V AC power supply cable for panel shall be of 2.5 sq mm stranded, tinned, annealed copper conductor. 24 V DC power supply cable for the panel shall be of 25 sq mm stranded, tinned, annealed copper conductor.Testing on CablesCheck details are in accordance with the specificationCheck for physical damageMegger test between each core and armor/sheathContinuity Check