Fork Design Wiring bars in fork design are ideal for the wiring of modular panel-mounting devices as per DIN 43880 with flat-type, dual-function or single-screw terminals. Additional incoming terminals are required when wiring devices with flat-type or single-screw terminals. In contrast, devices with dual-function terminals allow bar connection to the top section of the terminal with simultaneous incoming supply in the bottom section. The use of end caps on multi-pole wiring bars guarantees optimum shock-hazard protection and prevents arcing at bar ends. Pin Design Wiring bars in pin design are ideal for the wiring of modular panel-mounting devices to DIN 43880 with box terminal, frame terminal or two-scre clamp. The incoming supply to the wiring-bar system is provided over additional incoming terminals.