U Clip Bar

Description

Fork-Type Terminal Jumper Strips (Pre-Insulated Barrier Block Jumpers) A Fork-Type Terminal Jumper Strip (commonly known as a comb jumper, barrier strip terminal jumper, or busbar jumper) is a stamped conductive metal strip housed inside a protective plastic sleeve. Designed with flat, pronged forks spaced at precise distances, its purpose is to bridge multiple adjacent screw terminals together on a barrier terminal block, consolidating a single power or ground feed across several circuits simultaneously. Key Features Design Purpose: Replaces tedious manual wire jumping (“daisy-chaining”) between terminal blocks. It creates a clean, continuous parallel electrical connection while minimizing wire clutter inside an enclosure. Material: Built from high-conductivity copper alloy or brass, often tin-plated to ensure a corrosion-resistant, low-resistance connection. Pre-Insulated Sleeve: Encased in a flame-retardant PVC or nylon wrapper. While green typically designates a dedicated ground loop path, these strips are also widely available in red (for positive/live lines) and black (for negative/neutral lines) to visually organize circuit layout. Sizing & Configurations: Pitch Distance: Designed to match standard terminal strip screw spacings (such as 8.2mm, 9.5mm, 10mm, or 12mm center-to-center). Position Count: Available in pre-cut blocks (e.g., 2-position, 3-position, or 10-position lengths) that can be easily trimmed down with wire cutters to fit custom layouts. Electrical Capacity: Commonly rated to handle substantial power distribution loads, typically ranging from 15A to 25A at up to 400V–600V AC. Compatibility Guide Terminal block jumpers serve as the foundational hardware for splitting single incoming power drops into multiple isolated circuit branches. 1. Matching Component Connections Because pitch spacing must match perfectly for the forks to drop over the terminal screws, these jumpers must be paired with corresponding blocks: Dual-Row Barrier Terminal Strips: Drops straight onto standard surface-mount terminal strips (such as the TB-25 or standard 600V series blocks). DIN Rail Terminal Assemblies: Used alongside matching modular DIN-rail terminal blocks (like Dinkle or Phoenix Contact series) to distribute control signals down a dense row of connections. 2. Wiring & Trim Modifications Custom Length Adjustments: If an off-the-shelf 10-position jumper bar is too long, the internal metal rail and outer plastic insulation can be cleanly snipped using heavy-duty diagonal cutting pliers to bridge a smaller cluster (like a 4-screw section). Combining with Ferrules: Fits neatly underneath screw-clamp plates alongside pre-crimped wire ferrules or spade lugs, allowing a main supply line to lock down directly over the jumper. 3. Common Applications Power Distribution Hubs: Heavily utilized in industrial control panels to split a single 24V DC or 220V AC supply trunk across several relays, timers, or sensors. Ground/Earth Bus Bars: Used in green or yellow-green variants to tie multiple chassis points to a singular master grounding post safely. Control Panel Logic Clusters: Simplifies wiring grids inside HVAC controllers, custom automation panels, and industrial machinery where several control lines share a common neutral or return reference.