, Sicilian: Missina; Latin: Messana, Greek: Î¼ÎµÏÏÎ®Î½Î±) is the capital of the Italian province of Messina.
Arc Rating: A value of the energy necessary to pass through any given fabric to cause with 50% probability a second or third degree burn. This value is measured in calories/cmÂ². The necessary Arc Rating for an article of clothing is determined by a Hazard/Risk Assessment and the resulting HRC. Usually measured in terms of ATPV or EBT. Simple put the ARC rating determines the protective characteristics of the fabric. The higher the ARC rating value the greater the protection.
The Arc Thermal Performance Value (ATPV) is defined as the arc incident energy required to cause the onset of second-degree burn. The higher the ATPV the more protective the fabric. For those of you who were not physics majors (and that includes us), this âincident energyâ stuff means the amount of heat, or cal./cmÂ², projected at a certain distance (usually 18 inches) from an arc fault. ( If you donât know what an âarc faultâ is, you really donât need to read this.