On the base of standard, the gap between surge arrestor Class B and Class C installed, must not be less than 10 meters. Observe the distance, the problems that are created due to make the boards for fixing it, "Combination arrestor B+C" can be used. Some Class B arrestors have certain technology, that Class C arrestor can be installed immediately next to it.
On the base of standard, installed arrestor gap between Class C and Class D must not be less than 5 meters. Observe the distance, the problems that are created by the State Board for fixing, “Combination arrestor C+D“ can be used.