Analysis of the minimum installation temperature of flexible cable

Flexible cable temperature and the minimum installation of PVC cable material of low temperature brittle temperature must be inseparable relationship. But how do corresponding relationship, have yet to have authority report. Generally higher than the brittle temperature 5 ℃, the probability of impact test specimen cracking is zero. Theoretically, if the impact of the installation when laying at this moment, less than under the condition of test impact can be construction. But here involves a variety of cable type and construction specification and the testing data of the practice of support.
If you want to truly understand the installation temperature and material laying low temperature brittle temperature relations, is a larger research project, from materials, cables, construction construction (or copy) and so on each link of sampling test, the system to find the critical point of damage, so need a lot of resources and manpower support. Once the figure it out, in turn, to the enterprise is also a great feedback.
If there is really no authoritative data support, to GB/T12706 standard higher than the sheath brittle temperature 20 ℃, laying temperature for a given installation. Though with a difference of 20 ℃ to install laying temperature not so accurate, safe allowance is very big, but definitely not due to the construction temperature cracking quality problems. Differ 15 ℃ installing laying temperature is ok, but must strictly control cable type and construction.