Page 7 - Insulating Footwear

OUR BOOT FEATURES
All of our boots are approved to either EN ISO 20345:2011 or EN ISO 20347:2012 depending on their application. These icons are used throughout the catalogue to highlight the specific features and benefits of each boot.
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SB SBCategorySafetyBoot
Complies with the requirements for safety footwear in
EN ISO 20345:2011.
Energy Absorbing Heel
Provides a minimum of 20J cushioning at the heel, reducing the risk of fatigue and injury to joints and spine.
Boot Marking: E
Cold Insulation
The thermal insulation properties of the boot ensure that the temperature decrease inside 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
Live Working
Dielectric boots that comply with the EN50321 standard for electrically insulating footwear.
Boot Marking: Double Triangle
INSULATING, ANTISTATIC AND ESD FOOTWEAR
O4 O4CategoryOccupational Footwear
Complies with the requirements for occupational footwear in
EN ISO 20347:2012.
Fuel and Oil Resistant
The outer sole is resistant to oil, ensuring the working life of the boot won’t 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
SRA Slip Resistant SRA Tested and approved for
Toecap
Epoxy coated steel toecap fitted tested for 200J impact resistance and 15kN compression.
Hot Contact
The sole has been tested for contact with a hot metal surface at 300oC for 60 seconds.
Boot Marking: HRO
SRC Slip Resistant SRC Tested 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
resistance to slip on a ceramic
tile floor coated with a dilute soap solution of sodium lauryl sulphate (NaLS). The test measures forward slip on the heel and with the boot flat to the floor.
Boot Marking: SRA
According to EN 20345: 2011, a shoe or boot is considered to be antistatic if its’ measured electrical contact resistance falls between 100 kΩ
(105 ohms) and 1 GΩ (109 ohms). With a lower resistance, a shoe or boot is considered to be conductive and at higher values, to be insulating. This 100kΩ to 1GΩ range is regarded a sensible compromise for general safety footwear, giving protection from electrostatic build up and protection from electrical shocks at lower voltages. For Electro-Static Discharge (ESD) footwear, which us used in potentially explosive atmospheres and
in the production of sensitive electronic components and devices, the lower limit of electrical resistance is 100 kΩ (the same as for antistatic footwear) and the upper limit is 35 MΩ (3.5 x 107 ohms).
ESD
Footwear EN61340-5
Conductive Footwear Resistance <105Ω
105Ω
Antistatic Footwear EN 20345
3.5x107Ω
Insulating Footwear Resistance > 109Ω (e.g. Dielectric Boots)
109Ω Electrical Resistance
DIELECTRIC FOOTWEAR FOR LIVE WORKING 07
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