Wireway is designed to protect electrical wiring from dust, dirt, oil, and water. It is also designed to carry electrical feeders, branch circuits, and other groups of conductors. Most sections and fittings are completely open on one side so wires and cables can be laid in along an entire wireway run. No pulling through of wires or cables is required with most designs. Wireway can be used for a variety of applications and, in most cases, can be installed faster and at less expense than conduit. This tee is for use with NEMA 1 wireways. It has 4in length and 4in width. All wireway is UL listed under file E27524, 870, and CSA file 42184, Type 1.