Switchboard mats, Two classes of mat are available – Class A (Thicker Mats) for general purpose application & Class B (Light Weight) for use on flat indoor surfaces. Both the types of insulating mats as per ASNZS 2978 standard are intended to protect personnel where circumstances involve the possibility of contact with conductors or electrical equipment whose voltage does not exceed 650 V a.c. r.m.s. or d.c., between conductors or between conductors and earth. Manufacturer’s Test Certificate is provided along with the supply.