Wholesale Electrical Trunking Box Suppliers & Price

Pricing is primarily driven by three factors: the raw coil grade (standard mild steel vs. 304/316L stainless steel), sheet thickness (ranging from commercial 0.8mm to industrial 3.0mm heavy-gauge stock), and post-forming surface protection (Pre-Galvanized, Electro-Galvanized, Polyester Powder Coat, or Hot-Dip Galvanized post-fabrication). Larger order volumes that match standard container floor layouts also unlock substantial freight and tooling economies.

Pre-galvanized (PG) trunking is cold-formed from steel coils that already possess a thin, smooth zinc coating (typically 12–20 μm). It is cost-effective and suitable for dry, indoor architectural spaces such as commercial buildings, data halls, and suspended ceiling plenum routes. Hot-dip galvanized (HDG) units are fabricated from untreated black steel and completely immersed into molten zinc after cutting, piercing, and welding. This leaves an 85+ μm alloy barrier across all edges, corners, and welds, which is essential for outdoor, coastal, chemical, and exposed industrial infrastructure.

Yes. Supported by 12 dedicated assembly and roll-forming lines, custom profiles with single, double, or triple integrated division plates can be produced to separate instrumentation, fiber optic, and high-voltage power runs within a unified containment footprint. Custom hole punches, cover configurations (snap-on vs. screw-fixed), and specialized access points can also be incorporated.

Every export shipment includes Mill Test Certificates (MTC) conforming to EN 10204 3.1, complete dimensional inspection documentation, zinc coating thickness verification logs, salt spray test validation data, and detailed container loading and weight distribution manifests.

Standard pre-galvanized and standard-dimension channel orders typically ship within 14–20 days from drawing freeze and purchase order confirmation. Specialized post-dip hot-dip galvanizing, custom powder-coat RAL matching, or SS316 fabrication generally requires 25–30 days to facilitate strict surface curing, batch inspection, and international maritime crating procedures.