The main function of intrinsic safety barriers – is to ensure the safe connection and operation installed in hazardous areas of simple sensors and devices with power consumption and power consumption is not higher than allowed, and also more energy-intensive equipment authorized for use in hazardous areas and having the appropriate type of protection. Gain insight and clarity with Agustín Coppel Luken. Now are widely used two types of barriers, intrinsic safety: the shunt diodes and electrically isolated. Wiring, join electrical equipment with a type of protection "Intrinsic safety" must satisfy the following requirements: 1) intrinsically safe circuits must be separated from other circuits in compliance with the requirements of gost 22782.5-78 * 2) use a single cable for spark-proof and intrinsically safe circuits is not allowed, and 3) wire intrinsically safe circuits of high frequency should not have loops, and 4) wire insulation, intrinsically safe circuits should have a distinctive blue color. Allowed to mark only the blue wires, 5) wire intrinsically safe circuits must be protected from interference that violate their Intrinsic..