Metal Pattress 20/21 Module 438mm North-South EntryThe Crabtree All Metal Consumer Unit Pattress is designed to facilitate surface cable entry through rear knockouts while maintaining the enclosures IP rating. Compliant with BS7671, BSEN61439 3, and the IET onsite guide, this robust metal pattress ensures a secure and professional installation for 20 21 module Crabtree consumer units. Ideal for solid wall installations, the cable entry slot can be aligned North or South, providing flexibility during