U-1000 RO2V rigid core conductor rated voltage 600/1000 V Cable characteristics: With a thick sheath, these cables are commonly used in industrial installations where they can withstand severe conditions of use. Installation conditions: Without additional mechanical protection, these cables can be attached to the walls or to cable trays, shelves and other supports. Conductor marking: Earth: yellow/green - Neutral: blue - Phase: other. NF C 32-321 Standard.