Edison’s modular knifeblade fuse blocks for Class J and Class R fuses offer optional high-clarity, see-through, IP20 finger-safe covers, with or without indication. They have a built-in lockout/tagout feature that helps to improve safety by preventing unauthorized fuse insertion or removal. The modular fuse blocks have a snap-together design and are UL-listed with creepage and clearance distances for feeder and branch circuits; 200-A and larger fuse blocks also meet requirements for service entrance circuits. Modular Class J power distribution fuse blocks combine fuse block functionality with power distribution capability, eliminating the need for a separate power distribution block. Optional finger-safe covers are available.