The two-pole spiral cables are used to connect the intrinsically safe circuits of the SYMEGA series grounding monitoring systems with their peripherals (e.g. grounding clamps). The cable sheath is resistant to acids, alkalis, mineral oils, grease and other chemicals. As the spiral cables fulfil all the requirements of the DIN EN 60079-0 and DIN EN 60079-14 standards, they may be used in potentially explosive atmospheres.