TWH

6 coding systems recognise this code

CSA (Canada)

SymbolMeaning
TThermoplastic insulation (UNVERIFIED)
WWet locations (UNVERIFIED)
HHeat resistant (UNVERIFIED)
TWHThermoplastic 600 V wire used as an insulated ground conductor (UNVERIFIED). 600 V. not stated

Telecom/Signal/Fiber Optic (VDE 0815 - 0816 - 0888)

SymbolMeaning
TDistribution Cable
WSteel Sheath, Corrugated
HLow Smoke Zero Halogen Compound

NEC 310

SymbolMeaning
TThermoplastic Insulation
WMoisture Resistant
H75°C Insulation

NEC 400

SymbolMeaning
TFlat Tinsel Cord
WSuitable For Use In Wet Locations And Sunlight Resistant
HHeater Cord

CEI-UNEL 35011 (Italy)

SymbolMeaning
TTelephone Cable
WDivisible Flat Cable (Inetmediary Groove)
HMetallic Paper, Carbon Paper Or Aluminium Tape Screen

NBN

SymbolMeaning
TTelephone Cable
WPolyethelene (PE)
HResistant To Humidity