The 5TG4212 is a duct entry spigot (gland plate) for the Siemens DELTA line surface-mount trunking system. It mounts at the point where cables enter or exit the trunking channel, providing a neat, professional transition that keeps the installation looking clean and organized.

Which trunking sizes does this spigot fit?

The 5TG4212 is designed for 15×15mm and 17×17mm surface-mount channel profiles. These are the compact trunking sizes typically used for branch circuits, sensor wiring, and low-voltage control cabling inside control panels and equipment enclosures. For larger trunking profiles, Siemens offers other gland plates in the 5TG42 series—check the DELTA line catalog for the correct size match.

What does this spigot do for the installation?

The duct entry spigot serves two practical functions. First, it provides a defined cable entry aperture—cables pass through a clean, radiused opening rather than a raw cut edge, reducing the risk of insulation damage over time. Second, it maintains the trunking IP20 rating by closing the gap around the cables at the entry point, keeping dust and debris out of the channel interior. For installations where halogen-free materials are specified—public buildings, transit, healthcare—the 5TG4212 meets that requirement.