The 220 mm duct lid (Part No: TC1279-22SN) is a snap fit onto 220mm straight duct (Part No: TC1279-21). The lid is quickly and easily fitted and removed from 220mm straight duct, when required. Both the lid and duct are made of tough Noryl plastic with a non - halogen fire retardent. The duct connects to other duct sections and various bends, adapters, etc, using either: a standard joiner (Part No: TC1279-25: Telstra S 353/00515) or a slotless joiner (Part No: TC1279250A); which are available separately. A 220mm duct carries up to 800 x 3mm dia optical fibre cords to a depth of 50mm, without causing excessive crushing or stress on them. This is the maximum recommended number of optical fibre cords for 220mm duct.
WBT ducting raceway items, conform to the following standards and requirements: