... warm preservation, anti-freezing, lawn, public green space, soil heat preservation, stair snow melting, tank warming freeze protection, etc. ... and energy conservation.9. Under operating current, the clad material is not damaged even breaking for 5,000 times (30 ... fluorine plastic.1. Under normal temperature (maintaining heating), insulation resistance is more than 500mω, withstand voltage is 4,500v (ac ...