Measures to prevent wire and cable failure
By analysing the causes of failure of insulation, accessories and outer sheath, it can be seen that wire and cable engineering is a systematic project, and only through the whole process of management from design, construction, operation and maintenance can we ensure its safe operation to a large extent.
From the beginning of the design, we fully understand the grounding system used in the wire and cable, and select the cable that meets its voltage level, in order to avoid the wire and cable to work under long-term over-voltage conditions. The selection of the outer sheath should meet the requirements of the use of the environment and service life, and the selection of the cable sheath protector should meet the principle that the protector can reliably pass the ground current without damage when it is relatively grounded.
Cable routing should be selected to avoid overheating, corrosion, external damage and other external environment. , but also to avoid the wire and cable laying over-concentration leads to overheating and other internal factors, resulting in heat can not be diffused in a timely manner. In addition, it is not recommended to lay a double circuit power supply cable path in the same path of the pipeline, so as not to damage the cable path at the same time, resulting in large-scale power outages.
Strengthen the selection of wires and cables and cable accessories, manufacturer supervision, arrival and acceptance to ensure the quality level of cables and cable accessories. During on-site inspection, there should be manufacturers, construction personnel, supervisors and project supervisors present, checking one by one according to the packing list, recording problems found in a timely manner and putting forward suggestions for rectification, and signing and approving by many parties. After checking, the parts that are easy to be damp should be sealed in time to prevent dampness from affecting normal use.
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