A test to measure resistance or conductance of static electricity. This footwear is constructed to reduce excess static electricity by conducting the charge from the body to the ground while maintaining a high level of resistance to the wearer when exposed to hazards by stepping on live electric circuits. Test methods for Static Dissipation in the US, use a human test subject fitted in the footwear. A specified voltage is applied for a prescribed time and the electrical resistance is measured. The footwear should not be worn around highly charged electrical equipment. It is recommended static dissipative footwear be worn only in clean environments.
A test to measure electric shock insulation or resistance properties. This type of footwear is designed to provide a SECONDARY SOURCE of electrical hazard protection against the hazard of stepping on live electrical circuits, electrical energized conductors, parts or apparatus. To test electric shock resistant properties, footwear is filled with small metal spheres, placed on a metal mesh platform acting as a large electrode than a second electrode is embedded within the spheres. A specified voltage is applied to the footwear on the outer metal platform for an allotted time. Resistance is determined by measuring current flow (or leakage current) and any arch flashing through the footwear. Protection is severely deteriorated in humid or wet environments as well as excessive wear on the soling material or sole contamination. In step potential environments dielectric overshoes should be used.
A test of the shoe's capacity to protect the toe area against heavy rolling objects. The Test Method for Compression testing is to compress the toe cap area using a compressive force at a given rate of speed until the required compressive force is reached. Prior to testing, a modeling clay cylinder is placed inside the toe cap area. The remaining clearance inside the cap after compression is then determined by measuring the minimum height of the modeling clay cylinder.
A test of the shoe's capacity to protect the toe area against falling objects. The Test Method for Impact testing is to drop a weight onto the protective toe cap area of the footwear. Prior to the drop, the toe cap area is filled with a modeling clay cylinder. The test identifies shape of the steel weight, mass, and distance the weight must be dropped. The testing apparatus measures velocity and energy at impact. After impact the remaining clearance inside the toe cap is measured by the minimum height of the modeling clay.
A test to measure the level of protection provided to the metatarsal bones in the upper foot. Metatarsal protection is designed to reduce the chance of injuries to the metatarsal bone areas exposed to drop hazards. Prior to testing, a wax form or bar is fitted into the protective footwear cavity. A weight is dropped from a specified velocity to create a specified energy onto the protective metatarsal area of the footwear. The height of the wax form after impact is then determined by measuring from the lowest point of the impression made in the clay form to the bottom of the surface form.