4 conductors | PVC Insulation | PVC Jacket | 600 V AC | Electric Range and Dryer Cords W = Power Supply Cable | 8-4/0 AWG | 2, 3, 4 or 5 conductors | EPDM Insulation | Super Vu-Tron Jacket | 2,000 V AC | Extra Hard Usage Outdoors S = Severe Service Cord – 600 volts (also 277/480 or 480) – May be utilized in place of SJ or SV in extra-severe service SJ = Junior Severe Service – 300 volts (also 120 or 120/208 or 120/240 or 240 or 277, but not 277/480) SVT = Vacuum cleaner cord, or light duty cord T = Tinsel Cord (only if first letter of code for a portable cord) T = Thermoplastic (if not first letter of code) H = Heat Resistant HH = High Heat Resistant N = Nylon Outer Jacket Material E = Elastomer (flexible thermoplastic that looks and feels like rubber) O = Oil-Resistant Outer Jacket OO = Oil-Resistant Outer Jacket and Oil-Resistant Interior Insulation P = Parallel Cord (conductors are not twisted around each other) V = Vacuum Cord – 300 volts (typically used with vacuum cleaners and other portable cleaning equipment) W = Weather Resistant (UL approved for indoor and outdoor use) W = Weather and Water Resistant (CSA approved for indoor and outdoor use) See also Power cable Electrical wiring 10603 References Power cables