Dielectric HV3+ Boots

A Class 3 AC (EN 50321-1:2018) electrically insulating dielectric boot with an integral steel toe cap. The Workmaster™ Dielectric HV3+ boot allows high voltage live working at up to 26.5kV with every boot tested at 30kV.

  • Lightweight design for increased wearer comfort
  • Low temperature flexibility down to -40ºC
  • Durable, slip resistant vulcanised rubber for maximum grip
  • Energy absorbing tunnel system in heel and ergonomic cushioning insole (removable and machine washable) for greater wearer comfort
  • Cold insulation to EN ISO 20345
  • High-visibility green HV3 compound shaft
  • Meets the requirements of ASTM 1117 (20kV)
  • Also available in a moulded sole version (without fuel & oil resistance, resistance to hot contact or cold insulation for the sole and SRC slip)
  • Cold InsulationCold InsulationThe thermal insulation properties of the boot ensure that the temperature decrease of a boot at 23oC when placed in a cold chamber at -17oC is less than 10oC after 30 minutes when measured at the upper surface of the insole. Boot Marking: CI
  • Energy Absorbing HeelEnergy Absorbing HeelProvides a minimum of 20J cushioning at the heel, reducing the risk of fatigue or injury. Boot Marking: E
  • Fuel Oil ResistantFuel Oil ResistantThe outer sole is resistant to oil, ensuring the working life of the boot wont be compromised if used in oily environments. The test involves immersion in oil for 22 hours after which the sole is checked for excessive swelling, shrinkage or increased hardness. Boot Marking: FO
  • High VoltageHigh VoltageDielectric boots that comply with the EN50321 standard for electrically insulating footwear.
  • Hot ContactHot ContactThe sole has been tested for contact with a hot metal surface at 300'C for 60 seconds. Boot Marking: HRO
  • SB Category Safety BootSB Category Safety BootComplies with the basic requirements for safety footwear in EN ISO 20345:2011
  • Slip Resistant SRCSlip Resistant SRCTested and approved for resistance to slip on a ceramic tile floor coated with a dilute soap solution of sodium lauryl sulphate (NaLS) [SRA] and Slip resistance on steel floor with glycerol [SRB]. The tests measure forward slip on the heel and with the boot flat to the floor. Boot Marking: SRC
  • ToecapToecapEpoxy coated steel toecap fitted tested for 200J impact resistance and 15kN compression.



  • Safety Footwear EN ISO 20345:2011 - SB HRO FO E CI SRC
  • Electrically Insulating Footwear EN 50321:2018 Class 3 AC
  • Personal Protective EquipmentPPE DIR 89/686/EEC
  • Conforms to ASTM F1117


  • Machine washable at up to 40℃
  • Shelf life of over 10 years 


  • Additional High DC Voltage test 
  • Removable thermal liner