Unistrand screened signal multicore cable defence standard unistrand 7 2 3c the unistrand defence standard 3 core screened signal cable 7 2 3c 100m is a multi core screened type c flexible cable that has an overall polyester tape with a tinned copper wire braid screenit has been manufactured in accordance with defence standard 61 12 part 4 the cable is designed for high density wiring in instrumentation and electronic equipment which includes avionic control systems computers data pr