Like galvanized pipe, there are two kinds of galvanizing of cable tray, namely cold galvanized (electro-galvanized) and hot-dip galvanizing (hot-dip galvanizing); Steel can easily rust in air, water or soil, or even be completely damaged. The mechanical and electrical characteristics, tests, certifications, overall quality management, recommendations mentioned in this technical guide only apply to our own cable management ranges and cannot under any circumstances be transposed to si osure, overheating or. I am pretty sure he means "Pre-Galvanized" which means the tray is made from galvanized steel sheeting. The final product is galvanized except where is was cut or welded. Check anybodys tray catalog and the difference is explained. But which one is better suited for your needs? In this guide, we'll analyze their differences, advantages, and drawbacks to help you make an informed decision. Zinc pro-vide sacrificial protection, which means that it cor-rodes while. Both pre-galvanized cable tray and hot-dip galvanized (HDG) cable tray are the two common types of cable trays, and they are essential components in electrical wiring systems, designed to support and route cables in industrial and commercial buildings.