Cable Basics
You’d think there’s not much more to say about cable pulling that hasn’t already been said in the past. Many books and articles have been published on the subject over the years, and not much has changed along the way. Ask anyone with at least a few years of experience under his belt, and you’ll likely hear a story or two of a difficult cable pull — where the tension reached critical limits, where a creative pull arrangement using unorthodox methods was employed, or where someone used a specific instrument that made all the difference. The fat loss bible colpo pdf download. Masked rider 555 ps2 iso. What many people don’t realize is that the key to a successful pull hinges on the steps you take before you even begin to feed the cable into the puller. Assuming a quality cable product has been procured and delivered safely to your job site, consider the following factors before you start the pull.
Basic Cable Channels
Temperature Various conductor insulations have different operating temperature ranges for safe installation and use. Electrical construction knows no season — as many cable pulls are performed in cold climates as in warm. A common error in judgment is to pull cable when it has been stored in a cold environment ( Photo 1). In this situation, the insulation has what is best described as a brittle condition like most any thermoplastic or rubber material. Bosch esi tronic software.
This condition is conducive to cracking or splitting, even when under minimal pulling tension or bend radii. Remember, damaged insulation is no different than no insulation at all in the long run. Moisture The presence of moisture more readily affects some cables than others. Moisture is just as important in the vapor state of matter as it is in liquid. Shielded cables, whether coaxial cable or medium-voltage power cable, can absorb moisture over time. This moisture level can significantly affect the insulation and capacitive characteristics of the cable. Capillary action negatively affects all types of electrical cable.