Dual wall construction Spec 44 600, 1000 and 2500 voltage rating Wire and cable Small size, light weight Low smoke and low corrosive gas generation Resistant to most chemicals and electrical arc tracking Spec 44 wire has a dual wall construction very tough, is easy to handle and install Glass braid type wire and cables. Spec 44 which combines the outstanding physical using conventional tools. wire is offered in a wide range of sizes in and electrical characteristics of radiation stranded conductors, standard materials Originally developed for aerospace and crosslinked polyalkene with the excellent available being tin or silver-plated copper military requirements in applications of mechanical and chemical properties of and high strength copper alloy. Voltage high density and complex circuitry, Spec radiation cross-linked polyvinylidene ratings of 600, 1000 and 2500 volts are 44 wire and cable now finds wide use fluoride (PVDF). available as standard. Shielded and throughout industry, in commercial and jacketed versions include single and The result is a wire insulation system that military electronics, avionics, on satellites, multi-conductor constructions and flat offers a 150C temperature rating, small aircraft, helicopters, ships, trains, and braid shields where further size and size, light weight,solder iron resistance, offshore platforms where environmental weight savings are achieved. and resistance to most solvents, fuels and conditions demand consistently reliable lubricants. Spec 44 wire and cable is performance. In airframe applications highly flame retardant, non-melting, does Spec 44 constructions can offer a modern not cold flow, and though mechanically dimensional replacement for PVC/Nylon/ 44 wire Conductor Primary Insulation - Jacket - Radiation Crosslinked, Radiation Crosslinked, Extruded Polyalkene Modified PVDF 44 cable (twisted pair) Specifications/Approvals Mil-W-81044, Mil-C-27500 (Cables) Def Stan. 61-12 Part 18 Issue 4 - Type 1 pliable (Maintenance Range) Def Stan. 61-12 Part 26 Issue 2 Type 1, 2, 3, 7, 8, 9 & METS 7, 8 & 9 VG 95218 Parts 20, 21, 22, 23 and 1000 NATO Stock numbers (NSN s) exist for most standard constructions Civil Aviation Authority Accessory Approval E11623 Lloyds Register of Shipping NASA Preferred Product List Raychem Specification 44Spec 44 Physical characteristics Small size 44A0111-22AWG equipment wire For details of appropriate tools see separate Spec 44 equipment wire, 600 volt rated has a 4.62 grams/metre max wire handling guide. The tin-plated conductor 0.19 mm nominal wall thickness compared to 22AWG PTFE equipent wire, usually specified is easily soldered or crimped. 0.25 mm and 0.38 mm for equivalent PTFE and MIL-W-22759 The insulation may be hot stamp marked or PVC wires in MIL-W-16878, MIL-W-22759 5.54 grams/metre max printed and does not need etching before or BS G210. General handling potting. Light weight The flexibility of Spec 44 and the ease with Lengths Because of the thin wall and low density of the which it takes a set makes it one of the easiest Spec 44 is available in long continuous lengths insulation materials considerable weight savings of the high performance wires to install. and can be supplied for use on automatic cut are made over similarly rated PTFE wires, eg:- Stripping is done with conventional die blade and strip wire preparation machines. strippers. Typical properties Temperature rating -65C to +150C Voltage rating (thin wall) 600 V Voltage rating (thick wall) 2500 V 2 Tensile strength and elongation of insulation 30 N/mm , 230% Notch propagation, 0.05mm notch Pass Solder iron resistance (370C, 1 minute) Pass Shrinkage, 200C <1% Low temperature bend -65C Voltage withstand (thin wall) 2500 V Insulation resistance (20C) 1500 M ohms for 1 km Resistance: fuels, oils, solvents Pass Environmental performance Temperature rating Solder iron/Overload resistance Voltage ratings Spec 44 wire and cable is rated for continuous The radiation crosslinking of the materials used Standard available voltage ratings for Spec 44 operation from -65C to +150C and for short in Spec 44 makes them non-melting at high wire are 600 volts (0.19 mm wall thickness), periods at temperatures as high as 300C. Heat temperature. As a result Spec 44 wire is 1000 volts (0.28 mm wall) and 2500 volts ageing tests are routinely performed at resistant to prolonged contact with solder irons (0.48 mm wall). temperatures of 200C (168 h) and 300C (6 h). and is resistant to current overloads which Electrical arc track resistance In addition Spec 44 s insulation will not shrink Spec 44 insulation demonstrates a total would melt most thermoplastic insulations. back under repeated cycling. resistance to arc tracking under both wet and Chemical resistance Mechanical performance The irradiated dual wall construction of Spec dry conditions at aircraft system voltages. Spec 44 wire provides better cut through 44 wire is highly resistant to many acids, alkalis, Low outgassing resistance than some wires with much thicker For use in space applications, special hydrocarbon solvents,fuels, lubricants, water walls. 600 volt equipment wire 44A0111 (0.19 constructions of Spec 44 wire are available and many missile fuels and oxidisers. mm wall) has 40% greater cut through with low outgassing characteristics, for use in Cold flow resistance than 600 volt PTFE insulated wire Radiation cross-linking of Spec 44 prevents an environment of high vacuum and high (0.25 mm wall). cold flow of the insulation - a recognised temperature. problem of some uncrosslinked materials. Fire hazard performance Flammability BS4066 vertical flammability Pass S424 14751 (Swedish chimney) Pass NFC 32070 (2) (French chimney) Pass IEC 332 part 3 (Cable ladder) Pass Smoke/Toxicity Index Smoke Index, Def Stan 61-12 (18) 6 per metre of wire Toxicity Index, Def Stan 61-12 (18) 0.8 per metre of wire Oxygen Index, NES 714 30% Oxygen Temperature Index, NES 715 >300C