Causes and Prevention Measures for Wire and Cable Damage
[Reprint]
In fact, the issue is not with the quality of the product itself, but rather due to the extreme cold of winter. The outer casing of wire and cable products is typically made of ordinary plastic.(PVC)When exposed to temperatures below freezing, rubber can harden, causing the entire wire and cable product line to become rigid and brittle. This can lead to the outer casing potentially detaching or being damaged with minimal external force. During winter, especially in northern regions, outdoor temperatures often fall below freezing, with ground temperatures possibly even lower. Therefore, if wire and cable products are placed outdoors or directly on the ground, the outer casing may likely come off. So, how can we prevent the phenomenon of wire and cable outer casing detachment during winter??Implement the following measures at each stage——
1Upon product dispatch, it is essential to implement insulation and protective measures during loading onto transportation vehicles. For instance, using enclosed transport to prevent direct exposure of the products.;Lay a soft pad over the product, such as bedding or other softer foams.;Handle products gently during loading; avoid rough handling and prevent excessive bending.
2Upon arrival at the destination or construction site, product suppliers shall deploy personnel to oversee the unloading process to prevent粗暴 handling during product unloading.
3Store: Place products indoors for storage, and cover the storage surface with an insulating layer, such as wood, bedding, foam, etc., to prevent freezing and dampness. Be mindful to avoid direct contact with the ground that could scratch the outer casing of electrical cables. Handle with care.
4When installing the product: it's best to choose a time in the mid-afternoon when the temperature is warmer. If possible, use a heater or similar equipment to pre-heat the product before use.“Warm up”Ensure the product reaches a high-performance state. For burial installations, pre-lay a protective layer in the cable trench, such as fabric or foam. For conduit installations, ensure the interior and exterior of the conduit are smooth to prevent scratching the wires. Pay special attention to iron pipes, choosing high-quality ones, as low-quality iron pipes may have numerous sharp protrusions inside, which could easily scratch the wire's outer sheath.
5Select Low-Temperature Cables: The low-temperature cables selected must be strictly in accordance with the national standardGB/T2951.14-2008》Testing requirements call for a trial, at temperatures below zero.35℃Place under the circumstances16hThen, mechanical property tests were conducted, involving repeated bending and flexing, as well as elongation and tensile tests on the insulation and sheath. The pass rate was above the required standard. The low-temperature cable boasts excellent low-temperature resistance, ensuring that the insulation and sheath remain intact and free from cracks or breaks even in the harsh cold external environment.
Guangdong Cable FactoryLimited Company(Original State-owned Guangdong Cable Manufacturer)Established1968Year,After more than four decades of development,Currently one of the largest manufacturers of cables and wires in the South China region.1995Year12No content provided for translation.3The company has reestablished Guangdong Cable Factory Co., Ltd.
