North American Cord Types Reference Chart

Cable Types
Type Description Gauge Size Range Number of
Conductors		 Insulation Jacket Voltage Applications
SPT-1 Service Parallel Thermoplastic
1/64" Insulation		 18 AWG 2 or 3 PVC No Jacket 300 Volts AC Indoor use
only
SPT-2 Service Parallel Thermoplastic
2/64" Insulation		 18 - 16 AWG 2 or 3 PVC No Jacket 300 Volts AC Indoor use
only
SPT-3 Service Parallel Thermoplastic
3/64" Insulation		 18 - 10 AWG 2 or 3 PVC No Jacket 300 Volts AC Indoor use
only
SVT Service Vacuum
Thermoplastic 		18 or 17 AWG 2 or 3 PVC PVC 300 Volts AC Indoor use
only
SJT Service Junior
Thermoplastic 		18 - 10 AWG 2, 3 or 4 PVC PVC 300 Volts AC Hard usage
indoors
SJTW SJT
Weather-Resistant		 18 - 10 AWG 2, 3 or 4 PVC PVC 300 Volts AC Hard usage
outdoors
SJTO SJT
Oil-Resistant		 18 - 10 AWG 2, 3 or 4 PVC PVC 300 Volts AC Hard usage
indoors
SJTOW/
SJTOOW		 SJT Oil-Resistant
Weather-Resistant 		18 - 10 AWG 2, 3 or 4 PVC PVC 300 Volts AC Hard usage
outdoors
S Service 18 - 2 AWG 2 or more Rubber Rubber 600 Volts AC Extra hard
usage indoors
SO Service Oil-Resistant 18 - 2 AWG 2 or more Rubber Neoprene 600 Volts AC Extra hard
usage indoors
SOO Service Oil-Resistant
Insulation/Jacket		 18 - 2 AWG 2 or more Rubber Neoprene 600 Volts AC Extra hard
usage indoors
SOOW Service Oil-Resistant
Insulation/Jacket
Weather-Resistant 		18 - 2 AWG 2 or more Rubber Neoprene 600 Volts AC Extra hard
usage outdoors
ST Service
Thermoplastic		 18 - 2 AWG 2 or more PVC PVC 600 Volts AC Extra hard
usage indoors
STW Service Thermoplastic
Weather-Resistant		 18 - 2 AWG 2 or more PVC PVC 600 Volts AC Extra hard
usage outdoors
STO Service Thermoplastic
Oil-Resistant		 18 - 2 AWG 2 or more PVC PVC 600 Volts AC Extra hard
usage indoors
STOW> Service Thermoplastic
Oil-Resistant
Weather-Resistant		 18 - 2 AWG 2 or more PVC PVC 600 Volts AC Extra hard
usage outdoors
SRDT Service Round Dry
Thermoplastic		 10 - 6 AWG 3 or more Vinyl Plastic N/A N/A Range and
dryer cords
W Weather-Resistant 8 - 2 AWG 2, 3, 4 or 5 EPDM Super Vu-Tron 2000 Volts AC Extra hard
usage outdoors

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