hangers suspended from ceilings, roof structures, or similar members.
Another excellent application for the U-channel is in suspended ceilings that contain lift-out ceiling panels. In modem construction, these lift-out panels provide ready access to mechanical and electrical equipment within the suspended-ceiling area. Accordingly, it is important that conduits installed in such an area do not prevent the removal of panels or access to the area. Rod-suspended U-channels provide the solution to conduit wiring in such areas.
Sections of the U-channel and associated fittings are available in aluminum or steel types. Another type of material that can be used for supports is slotted- angle-steel units. Numerous prepunched slots allow installers to bolt on rods, straps, and similar material without drilling holes. Slotted steel has unlimited applications in forming special structures, racks, braces. or similar items.
A cable-pulling kit (80149) has everything needed for any wire or cable-pulling job. Most large Public Works and all battalions have the wire installation kit. The heavy-duty power wire/cable puller plugs into any convenient 115-volt source. It pulls 15 feet of cable per minute and can be used with various attachments for almost any type of pulling job.
After a "fish" line has been blown or run through the conduit, a rope that is provided with the power cable puller can be pulled through the conduit. This rope. used with a cable grip, makes the actual pull. The power cable puller can be used in almost any configuration. Figures 5-22 through 5-27 are examples of the different setups.
As a CE project supervisor or crew leader, you need to train your crew on the proper solderless connector splices, soldering splices, and taping splices. You will need to spot-check the connections to ensure proper installation.
Solderless connectors (wire nuts) have almost completely eliminated soldering and taping for certain types of splices. They are designated to hold several electrical wires firmly together and provide an
Figure 5-22. - Pipe adapter to exposed conduit.
Figure 5-23. - Power unit to the power adapter.
insulating cover for the wires. They are available in several sizes. The size of the solderless connector is determined by the number and the size of the wires to be joined.Continue Reading