STATIC CONTROL AS/NZS 1020:1995
Material such as paper, plastic and textiles normally contain an equal number of positive and negative charges - that is, they are electrically balanced. Friction can disturb this balance, causing the material to become electrically charged. WS Workwear is made from natural fibres like cotton and cotton – blends that manage static build up. The AS/NZS 1020:1995 standard defines recommendations for the control of static electricity. l00% cotton and 50%/ 50% cotton blend products are defined as suitable fabrics to manage the risk of static build up. PPE (Personal Protective Equipment) is equipment or clothing that will protect the user against health or safety risks at work.
PPE CATEGORY RATINGS NFPA 70E
These guideline ratings have been provided to ensure you are protected from Arc Flash. An Arc Flash is an explosive release of energy caused by a current passing between two points. Garments are rated based on their ability to protect against electrical arcs. This arc rating is expressed in cal/cm 2 . The protective clothing worn by employees must be based upon the incident energy associated with the task being performed. PPE is specified in the NFPA 70E Safety Standard and defines the level of protection required for a particular job or task.
REQUIRED MINIMUM ARC RATING OF PPE CAL/CM 2
HAZARD / RISK CATEGORY
CLOTHING DESCRIPTION (TYPICAL NUMBER OF CLOTHING LAYERS IS GIVEN)
Arc-rated shirt and FR pants or FR coverall (1 layer)
1
4
Arc-rated shirt and FR pants or FR coverall (1 or 2 layers)
2
8
Arc-rated FR shirt and FR pants or FR coverall and arc flash suit selected so that the system arc rating meets the required minimum (2 or 3 layers) Arc-rated FR shirt and FR pants or FR coverall and arc flash suit selected so that the system arc rating meets the required minimum (3 or more layers)
3
25
4
40
As the PPE categories increase, so too do the Arc-Rating clothing requirements. Arc Thermal Performance Value (ATPV) defines the protection level against second and third degree burns and measures heat transfer through fabric.
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