This category covers supports and enclosures that carry and protect conductors from cabinet to field: trunking for interiors, closed ducts for clean runs, open ladders for heavy bundles, and accessories that keep routes secure and compliant. Wiha structures the range by route type (enclosure interior, wall or ceiling, machine frame), load class, and environment (indoor IP20, dusty or splash zones, outdoor UV). Buyers are panel shops, line builders, contractors and MRO teams who want predictable sizes, quick install hardware, and accessories that arrive in one pick. Most distributors stock common widths, corners, tees and end caps alongside mounting clips and hardware kits.
Cabinet and machine interiors use compact trunking in 25–100 mm widths with clip-in covers; fingered variants guide conductors to terminal rows while protecting ferrules. Smooth-wall duct serves sensor and network lines that need tighter bend control. Profiles ship in standard lengths with score lines for clean snaps; covers re-use after rework, which keeps maintenance costs down. Color coding—grey for control, blue for low-voltage, yellow for safety—helps audits and reduces misrouting.
For plant routes, pick ladder or perforated tray by load and debris tolerance. Ladders handle heavier bundles, better ventilation and vertical drops; perforated trays support small harnesses and protect against falling objects. Accessories include splice plates, dropouts, radius bends and reducers so transitions stay gentle and insulation intact. Wall brackets, ceiling hangers and cantilevers share hole patterns; installers like that one template handles most spans. Stainless options solve washdown and coastal sites; powder-coated steel fits utility rooms and corridors.
Used across MCC rooms, packaging halls, HVAC rooftops, wastewater galleries and machine skids. Internally, trunking sits above terminal blocks and PLC I O; externally, trays carry feeders to drives, motors and sensors. Basket building is straightforward: add DIN rails, terminal blocks, cable glands, shield clamps, PE bars and marker sleeves so the full route—from panel to device—lands in one delivery. For documentation, your team may list these under wiha electrical wiring systems to align with site standards.
Entry plates accept EMC and standard glands sized to printed cable ODs; shield clamps maintain 360° bonding right at the gland and hand off to PE terminals. Trunking marker carriers use the same label stock as terminal markers, so IDs remain consistent door to device. Where lighting or sensors share the frame, use the same M8 or M12 cord sets and strain reliefs so spares match across the plant.