Table of Contents
- 1 What are cable rollers used for?
- 2 How do you pull a cable through a cable tray?
- 3 What are cable socks?
- 4 What is meant by cable laying?
- 5 How does a cable sock work?
- 6 Is cable pulling hard?
- 7 What are the different types of cable trays?
- 8 What type of cable roller should I use?
- 9 What is a 33kV power cable roller?
What are cable rollers used for?
Cable Rollers are designed to ease the procedure of handling and installing cables while on site. Suitable for general cable installation work in trenches, cable rollers are popular when dealing with telecoms, utility and power installations.
How do you pull a cable through a cable tray?
Install a simple pulley system above the cable tray. Tie the pull string around the pulley wheels, making a continuous pull. Tie the new cable to the string and pull (or push) the string through the pulleys. Once the new cable is in position, release it from the string and place it into the cable tray.
What are cable socks?
Cable socks, sometimes called cable stockings or cable grips provide an efficient method of supporting cables for pulling and laying into open-trench or duct – this includes LV Low Voltage, MV Medium Voltage or HV High Voltage cables.
What is cable pulling?
Cable pulling is the moving of lengths of cable from one place to another in order to install a connection of some type between disparate areas.
Where can cable tray be installed?
Cable trays shall be permitted to extend transversely through partitions and walls or vertically through platforms and floors in wet or dry locations where the installations, complete with installed cables, are made in accordance with the requirements of 300.21.
What is meant by cable laying?
adjective. involved in or connected to the activity of laying cables. a cable-laying ship. a cable-laying company.
How does a cable sock work?
Using Cable Socks Cable socks are manufactured in galvanised steel, stainless steel or non-conductive (Aramid) material – the socks can be used with swivel links which are cable pulling fittings attached between the sock and the draw rope to reduce twisting.
Is cable pulling hard?
Pulling wires can be difficult enough through straight runs of conduit, but throwing a few bends and turns in the run increases friction, making pulling much more difficult.
What are the hazards of cable pulling?
Risk Description: Electricians who pull wire through conduit can develop rotator cuff tendonitis, low back pain from lifting materials overhead, and tension neck syndrome. Tendonitis occurs when the tendon becomes inflamed.
How do they install cable?
Cable-to-cable installation
- Connect the cable from the wall to the cable box input, then screw the coaxial cable onto the cable box’s output connector.
- Screw the other end of the cable into the TV’s cable input connector on the back (most current TVs still have them).
What are the different types of cable trays?
Cable trays are made of either steel, aluminium or fibber reinforced plastic (FRP) and are available in six basic types,
- Ladder Type Cable Tray.
- Solid Bottom Cable Tray.
- Trough Cable Tray.
- Channel Cable Tray.
- Wire Mesh Cable Tray.
- Single Rail Cable Tray.
What type of cable roller should I use?
A leading roller should be used to support the cable over the entire drum width immediately before being fed or pulled into the trench. Slide corner rollers are used on bends and “hoop” type straight cable rollers along horizontal cable run sections.
What is a 33kV power cable roller?
Cable rollers provide correct levels of support and stability to ease the installation of medium/high voltage cables into cable trenches – here 3 x cable drums of 33kV power cables await laying into the trench with both standard rollers and lead-in types positioned to commence and handle the 33kV cable pull.
Why are cable rollers placed in the trench?
Straight Horizontal Cable Runs Rollers are generally placed into the trench to prevent the LV-HV cable from incurring damage to the sheath from trench debris or aggregate. The spacing of cable rollers depends on the cable type being installed and the pulling tension along the route.
How far apart should cable rollers be spaced?
The spacing of cable rollers depends on the cable type being installed and the pulling tension along the route. A leading roller should be used to support the cable over the entire drum width immediately before being fed or pulled into the trench.