... 300 Vac, Horizontal flame. Conductor28 AWG or larger, solid or stranded, Resistance Wire Alloy spirally applied around a glass "Aramid" fiber core ... spacer shall be applied over the conductor assembly. InsulationSR - SILICONE, 45 mils min average, 40 mils minimum at any point ... tubing, raceway or the equivalent. Colors: White, blue, red, black, brown, yellow, green, transparent, yellow/green, etc...