The single-pole copper spiral cables are characterised by their extremely high flexibility. The copper core used consists of 226 individual copper strands, which minimise the risk of cable breakage. Their cable sheath provides adequate protection against acids, alkalis, mineral oils, greases and other chemicals. The spiral cables fulfil all requirements of the standards DIN EN 60079-0 and DIN EN 60079-14 and may therefore be used in potentially explosive atmospheres. The spiral cables are silicone-free.