VNTC Method 4 (M4) tray cable uses single-color insulation with sequentially numbered conductors instead of individually colored ones, following the ICEA M4 standard. It's rated 600V and TC-ER capable, so it handles both tray installation and exposed runs between trays and equipment.
Method 4 is especially common in larger-gauge control cables where numbering conductors is more practical than trying to distinguish a long list of individual insulation colors, and this is a sizable lineup with 133 SKUs to choose from.
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