Prysmian RFOU 250 V single-pair 1.5 mm² instrument cable with an approximate outer diameter of 11 mm and a gray sheath, manufactured in Norway. RFOU is a mud-resistant, flame-retardant marine and offshore control cable qualified to IEC 60092 and NEK 606. Typical use is in signal and low-voltage control circuits on ships, drilling rigs and offshore platforms. Supplied in 1000 m drums.