The step shape design of the copper alloy block affords the user the ability to install in confined spaces. The transparent cover provides IP20 touch safe protection as well as aids in visual inspection. The cover design incorporates dovetail tabs for nesting connectors together to create multiple configurations. The connectors can be DIN-rail or panel mounted for application versatility and have a high short circuit current rating of 100 kA or 200 kA RMS SYM Amps. The blocks are suitable for use with copper conductors.