Respirex Yellow 20kV Dielectric Safety Boots Class 0 Certified

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An electrically insulating Class 0 dielectric boot with an integral steel toe cap and vulcanized rubber sole for superior slip resistance.

Dielectric boots are used where there is a risk of electric shock from high voltages. Without the the correct PPE a high voltage electric current can stop the heart or produce fatal burns. 

Dielectric boots are used for working on live power or in the area of live power as current can jump large distances, especially in wet or damp conditions. Even when high voltage equipment has been switched off, there may be a residual charge on the equipment which could cause an injury. There have also been fatalities caused by digging in locations where power cables are buried underground and the cable has been inadvertently cut by a drill, shovel or mole.

    • SKU
    • HS Commodity Codes
  • Country of Origin
    United Kingdom
  • Size UK/EU
    5/37, 6/39, 7/41

EN 50321-1:2018 is the new standard for insulating footwear for live working and was published earlier this year, it replaces EN 50321:1999 and is currently out for approval as an IEC standard which will make it a global standard, not just European.

The main changes in the 2018 revision are the introduction of new 4 classes (see below) for working up to 36 KV (the old standard only went up to Class 0 - 1 KV). Boots are now tested by filling with water instead of ball bearings to simulate water or perspiration potentiality wicking up the lining and creating a flash over. There is also now an electrical test after perforation of the sole by a nail, to ensure boots still give electrical protection after perforation. Even non-metallic perforation inserts can allow water to pass through them so will allow an electrical current to pass when the sole is punctured. The table below lists the classes and the test requirements:

Class RatingMaximum Working VoltageWithstand Test VoltageLeakage Current Test VoltageMaximum Leakage Current
Class 00500V5kV2.5kV3mA
Class 01kV10kV5kV5mA (8mA)
Class 17.5kV20kV10kV10mA (16mA)
Class 217.5kV30kV20kV18mA
Class 326.5kV40kV30kV20mA
Class 436kV50kV40kV24mA

(Overboot requirements are in brackets where they are different from knee high boots)