Constant Wattage Heat Cable J4 typed constant wattage heat tracing cable (also called PHC heating cable)is designed with an operating temperature up to 180鈩? while the maximum tolerance temperature can reaches 260鈩? So it is the ideal solution to those pipe tracing situations which require higher temperatures for process maintenance as well as freeze protection. The twin copper bus wires inside the cable provide a reliable, consistent electrical current, protected by an insulate jacket which holds the two bus wires together and provides the wrapping surface for the nichrome heating wire.The nichrome resistance wire plays a role as the heating component. An anti corrosive insulation jacket made from FEP material assures the electrical heating cable a longer service life. Over 85% parts are covered by metal braid which can enhance the stability, also provides a positive ground path. An optional fluoropolymer outer jacket can be added to make the cable even more explosion-proof and corrosive resistance. Due to the unique parallel structure, J4 electrical heating tape can be cut in length, but should avoid the heating nodes when cutting, and the length after cutting should exceed 3m to ensure the electric circuit keep on working. One more advantage is that should one small part of the heating element is out of working, the wattage produced by other parts of the heating element remains unchanged, which means the whole system is still keep on heating. Anyway, Because the power output does not change, the cable shouldn't cross itself, otherwise, it will leading to overheat or burnout risks. With years of experience on researching and manufacturing heat trace products, to ensure our products are always of the best quality in the industry, we never use cheap recycled materials, strictly 100% quality inspection, furthermore, the starting current of our heating cables is extremely lower, nearly just 1.7 times of the working current, which assure our electric cable a much longer service life than others in the market.Constant Wattage Heat Cable website:http://www.heattracesn.com/electrical-heat-tracing/constant-wattage-heat-cable/