Approx LBS/MFT10.00, 11
AWG Size18
Cond. MaterialTinned Copper
Conductor Stranding16/30
Copper LBS/MFT5
CSA TypeCSA C22.2 No. 38 FT-1 & FT-2
Insul. MaterialCross-Linked Polyethylene (XLPE)
Max. Temp90C
SIS wire is for use in dry locations for wiring electrical switchgear, control panels, substations, and equipment only. The NEC SIS category covers wires between 14 AWG and 4/0 AWG, and the maximum temperature that's allowed is 90°C. The lower size limit for SIS wires is 14 AWG, so wires between 18 AWG and 14 AWG have this marking: "Suitable for switchboard use."