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Be very careful dragging Cat 5 / 6 cables. They are not overly robust and it is quite easy to snap the conductors. Never try and drag a cable if it feels stuck or is not moving. Try and gently ease it back and try drawing it again. It is a rookie error to try and jerk or snatch a cable that wont move, you will most likely damage or snap it - this is especially important when trying to pull cables through cavities or dry liners. The cable should always be moving relatively freely. I often try and draw a pair of cables together as it improves the overall tensile strength of the cable (but also increases it resistance too). I tend to bond them together with tape at 20cm intervals for the first metre or so.
Its always good practice to check the cable continuity as soon as you have dragged it rather than waiting 2 weeks to find out that you have damaged the cable during install.
With regard drawing up cavities - you may find obstructions, depending on where you are drawing your cables. Things like cavity trays, snot, strapping, half blocks / bricks etc can sometimes foul parts of the cavity.
Final advice - drawing cables is ideally a 2 man job, 1 to feed and one to draw. Most of all, be patient. |
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