Insulation | No Jacket | 300 V AC | Indoor Use Only SVT = Service Vacuum Thermoplastic | 18 or 17 AWG | 2 or 3 conductors | PVC Insulation | PVC Jacket | 300 V AC | Light Usage Indoors SJT = Service Junior Thermoplastic | 18-10 AWG | 2, 3 or 4 conductors | PVC Insulation | PVC Jacket | 300 V AC | Hard Usage Indoors SJTW = SJT, Weather-Resistant | 18-10 AWG | 2, 3 or 4 conductors | PVC Insulation | PVC Jacket | 300 V AC | Hard Usage Outdoors SJTO = SJT, Oil-Resistant Jacket | 18-10 AWG | 2, 3 or 4 conductors | PVC Insulation | PVC Jacket | 300 V AC | Hard Usage Indoors SJTOW = SJT, Oil- & Weather-Resistant Jacket | 18-10 AWG | 2, 3 or 4 conductors | PVC Insulation | PVC Jacket | 300 V AC | Hard Usage Outdoors SJTOOW = SJT, Oil-Resistant Insulation, Oil- & Weather-Resistant Jacket | 18-10 AWG | 2, 3 or 4 conductors | PVC Insulation | PVC Jacket | 300 V AC | Extra Hard Usage Outdoors S = Service | 18-2 AWG | 2 or more conductors | Rubber Insulation | Rubber Jacket | 600 V AC | Extra Hard Usage Indoors SO = Service, Oil-Resistant Jacket | 18-2 AWG | 2 or more conductors | Rubber Insulation | Neoprene Jacket | 600 V AC | Extra Hard Usage Indoors SOO = Service, Oil-Resistant Insulation & Jacket | 18-2 AWG | 2 or more conductors | Rubber Insulation | Neoprene Jacket | 600 V AC | Extra Hard Usage Indoors SOOW = Service, Oil-Resistant Insulation & Jacket, Weather-Resistant | 18-2 AWG | 2 or more conductors | Rubber Insulation | Neoprene Jacket | 600 V AC | Extra Hard Usage Outdoors ST = Service Thermoplastic | 18-2 AWG | 2 or more conductors | PVC Insulation | PVC Jacket | 600 V AC | Extra Hard Usage Indoors STW = ST, Weather-Resistant Jacket | 18-2 AWG | 2 or more conductors | PVC Insulation | PVC Jacket | 600 V AC | Extra Hard Usage Outdoors STO = SThermoplastic, Oil-Resistant Jacket | 18-2 AWG | 2 or more conductors | PVC Insulation | PVC Jacket | 600 V AC | Extra Hard Usage Indoors SRDT = Service Round Dry Thermoplastic (flat or round) | 10-6 AWG | 3 or