100kA Short Circuit Current Rated Power Distribution Block for splicing or tapping of 1-2 Primary Conductors to 1-12 Secondary Side Conductors. 1 x 600 MCM-4 AWG Line, 1 x 600 MCM-4 AWG Load Power. Distribution Blocks are made of Valox Nylon 6/6, Finger Safe Lexan 500R Polycarbonate Panels and Covers, high-conductivity 6061-T6 Electro-Tin Plated aluminum alloy connector. Each block can stand alone or combine with other blocks to form a multi-block set, and are also Din Rail Mountable with built in locking mechanism to lock/release.