6 of the 2002 NEC, new text was added: “Ferrous metal raceways, cable trays, cablebus, auxiliary gutters, cable armor, boxes, cable sheathing, cabinets, metal elbows, couplings, fittings, supports, and support hardware shall be suitably protected against corrosion. In 300. This article explains the underlying engineering logic behind galvanizing sequence, and why serious manufacturers consistently galvanize after fabrication. If shiny galvanized wire is welded into. Section 300. Staying relatively unchanged (for the most part) since 2005, Panel 3 (of which I was a member from. Welded wire mesh cable trays are open-grid support systems engineered from high-strength steel wires—Q235B carbon steel (mechanically equivalent to ASTM A36) or 304/316 stainless steel—precision-welded into 50×100mm (~2×4") or 100×200mm (~4×8") grids with >90% open area. Unlike enclosed trays. This guide provides detailed insights into preventing corrosion and extending the lifespan of cable trays. Corrosion can weaken cable trays, leading to failures that disrupt operations and pose safety risks. There is a solution for each type of environment. This white paper compares the High Resistance (HR) and Hot-Dip Galvanising (HDG) solutions and highlights the new High Resistance range, ZnAl. Part of the book series: Topics in Mining, Metallurgy and Materials Engineering ( (TMMME)) Welded structures are protected against corrosion in four ways: Technological support for the corrosion resistance of welded structures means minimizing changes in chemical composition, microstructure.