How to calculate an Intrinsically Safe loop approval including the impact of using Ex ic (Zone 2) and gas group on cable lengths. Revised & updated Dec 2020
We all know what can happen when the correct techniques are not used when interfacing into the Hazardous Area. Using Intrinsic Safety (Ex i based on IEC/ SANS 60079-11; IEC/ SANS 60079-25), the energy in the hazardous area is limited to below the ignition energy of the gas present, thereby preventing explosions.