Boot Safety Standards

Class 75 (I) footwear for men shall demonstrate a minimum interior height clearance of (75 ft-lbf). Applies to both steel and composite protective caps.

Class 75 footwear for women shall demonstrate a minimum interior height clearance and 11.9 mm (0.468 in.) during impact exposure of 101.7 J (75 ft-lbf). Applies to both steel and composite protective caps. CSA

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Grade 1

Footwear for men and women must withstand an impact energy of 125 joules (the equivalent of a 50 lb. object dropped at a height of 22 inches) with no cracking through the thickness of the cap wall. Samples must be conditioned and tested at both 70 and 0 degrees Fahrenheit. The minimum interior height clearance varies according to shoe size (ranging from 10.7 mm for a woman’s size 3 to 14.2 mm for a man’s size 14). Protective toecaps must show no signs of corrosion when exposed to a 5% salt solution for 24 hours.


Safety footwear must be tested in accordance with EN ISO 20344:2004. After an impact energy of 200 joules is delivered, the clearance under the toe cap shall be the following:

Size 7-8 14.0 mm
Size 8.5-10 14.5 mm
Size 10.5+ 15.0 mm



Electric Shock Resistant (EH) footwear is built into both safety toe styles (that meet the Class 75 requirements for impact and compression resistance) and styles that are non-safety toe (soft toe). Must withstand the application of 14,000 volts at 60 Hz for 1 minute with no current flow or leakage in excess of 3.0 milliamperes under dry conditions.


Electric Shock Resistant (ESR) footwear must also meet the Grade 1 requirement for impact resistant footwear. ESR footwear must withstand a test potential of 18,000 volts at 60Hz for 1 minute without disruptive discharge to ground. Under dry conditions, the leakage current shall not exceed 1 milliamperes. Footwear is labeled with an orange omega on a white rectangle.


Electrical Insulation is determined according to the method described in EN 50321:1999. Footwear must comply with electrical class O or OO. SINGAPORE Tested in accordance with SS 513 : Part 2 : 2005


test methods and requirements are identical to the EN Standard.