electrical wire Rating 250 deg. C, 600 V. Conductor Nos. 28-4 AWG, solid or stranded Insulation MFA, 10 mils minim 1.electrical ... wireRating 250 deg. C, 600 V.Conductor Nos. 28-4 AWG, solid or strandedInsulation MFA, 10 mils minimum average, 8 ... Bend.(12) Horizontal Flame Marking General.Use Internal Wiring. electrical wire