SPT-2

3 coding systems recognise this code

NEC 400

SymbolMeaning
SExtra Hard Usage Flexible Cord
PParallel Conductor Cord
TThermoplastic Insulation And Jacket
-2Insulation Thickness (Normal) / 0.045" (1.143 Mm)

NEC 402

SymbolMeaning
SSilicone Rubber
PPerfluor (Ethylene Propylene - FEP - Teflon)
TThermoplastic Insulation
-2Insulation Thickness (Normal) / 0.045" (1.143 Mm)

IEEE 1580

SymbolMeaning
SSingle Conductor Distribution, 2 kemil
PCross Linked Polyolefin (XLPO)
TPolyvynil Chloride (PVC)