XHH

6 coding systems recognise this code

NEC / UL (USA)

SymbolMeaning
XThermoset (cross-linked polyethylene) insulation
HHHigh heat resistant, 90 C
XHHThermoset (XLPE) high heat-resistant building wire, dry and damp locations. 600 V, 90 C dry and damp. UL 44; NEC Article 310

Old VDE 0250

SymbolMeaning
XSimilar To VDE Standard
HLow Smoke Cross Linked Compound
HLow Smoke Cross Linked Compound

NEC 310

SymbolMeaning
XCross-Linked Polymer Insulation
HH90°C Insulation

NEC 402

SymbolMeaning
XCross-Linked Polymer Insulation
HH90°C Insulation

NBN

SymbolMeaning
XCross Linked Polyethelene (XLPE)
HResistant To Humidity
HResistant To Humidity

ZN-TF-500

SymbolMeaning
XPolyethelene (PE)
HCable With Radial Field Power (>3kV)
HCable With Radial Field Power (>3kV)