ProtecWork Catalogue 1
Why calories? When an electric arc is triggered,
different types of energy or risk factors are created, such as arc power, arc energy and incident energy, all of which are measured in calories. This is why calories per square metre (cal/cm2) has become the unit used to measure a material or product’s level of protection. What is a calorie? A calorie is the amount of energy needed to increase the temperature of one gram of water by one degree Celsius, or to be precise, to increase the temperature of one gram of water from 14.5 to 15.5 degrees Celsius under standard atmospheric pressure of 1013 hPa. Make sure your whole outfit offers adequate protection Based on various tests and reports and our years of experience, we recommend that you should never wear garments that offer total protection of less than 11 calories/cm2 if you are going to work in or near a high-risk environment. This calorie level does not in any way provide total protection, far from it, but should be seen as a minimum level. Different jobs require different levels of protection, and the higher the calorie level your clothes (or outfit) have, the better protection you get. Be sure you know the risk level before you enter a specific risk environment, and wear appropriate clothing. DANGER Arc Flash & Shock Hazard Present Appropriate PPE Required ARC FLASH HAZARD PROTECTION Nominal System Voltage: 600 Incident energy: s. at Working Distance of: 18 in. Arc Flash Boundary 42 in. 600 VDC Shock Hazard When Cover Open Shock Protection Boundaries: Limited Approach Boundary: 36 in. Resticted Approach Boundary: 18 in. 38.2 (cal/cm2 ) Arc-rated arc flash suit hood Safety glasses or safety goggles (SR) Hearing Protection (ear canal inserts) Arc-rated gloves Leather footwear Arc-rated long-sleeve shirt (AR) Arc-rated pants (AR) Arc-rated arc flash suit jacket (AR) Arc-rated arc flash suit pants (AR) Equipment Name: SWITCH TK-421 Date of Arc Flash Risk Assessment 12/2/2015 13