... range of Clipsal circuit breakers, RCDs and combination MCB/RCDs. Covers suit all 56 Series Enclosures (minimum standard depth 63mm) are ... flap is opened. A special membrane, incorporated into the units covers MCBs, RCDs and accesso-ries to provide a barrier against ... range of Clipsal circuit breakers, RCDs and combination MCB/RCDs. Covers suit all 56 Series Enclosures (minimum standard depth 63mm) are ...