... Credit; 4.Well Management. ApplicationThis production is suit to control, monitor loop, protect circuit, rated and below voltage 450 ... /750V. it can be used in indoor, cable trench and fixed pipe also.Production StandardGB/T9330.1- ... long-term working temperature is 70 °C;3.The cable cannot be used when the temperature is below zero, ... be below 6 times outside diameter of the cable. Control Cable