In the severe cold in winter, many construction workers will find such a problem when laying and installing Aerial Bundled Cable: ABC cable products with good quality usually have some hardening of the wire body and peeling off of the insulation coating. In view of these phenomena, many construction workers think that the wire and cable products themselves have quality problems, but in fact, the insulation of the cable products is damaged or peeled off, which is not necessarily the product quality problem. Next, let’s take a look at the reasons and preventive measures for the damage and fall of the cable sheath.
- The cable sheath is damaged or peeled off, which may be caused by the cold weather in winter. The outer skin of wire and cable products is mostly ordinary plastic (PVC) or rubber. When they are in a sub-zero environment, they will become hard, especially in the north. In winter, the outdoor temperature is often below zero, and the surface temperature may be more Low, if the wire and cable product is placed outdoors or directly on the ground, the entire wire and cable product line will become hard and brittle, causing the outer skin to fall off and be damaged under a slight external force.
- Can (ABC) HD 626 S1 Standard sheath be used if it is damaged?
Try not to use it. The reason is: the sheath of the cable plays a protective role. If the cable is used directly without the protection of the sheath, it will soon cause leakage. Therefore, try not to use the cable sheath if it is damaged or falling off. If you must use the cable, you need to Take some protective measures, such as: for outdoor cables, you need to use waterproof insulating tape first, and then use heat shrinkable tubing, just fine; if it is used for high-voltage lines, you need to deal with the damaged insulation skin, generally high-voltage Wrap a certain number of turns with tape to make it fully meet the 10KV high-voltage cable insulation requirements; for severely damaged cables with partial discharge phenomena, a section of the partially damaged high-voltage cable should be discarded, and it should be done in a partially damaged place. High pressure connector.
- Measures to prevent damage and fall off of the cable sheath in winter:
(1) When the cable is shipped out of the factory, warm and protective measures are required, such as: use enclosed transportation tools to prevent the product from being directly exposed; padded the product with a layer of soft cushion, such as bedding or other soft foam. (2) Cable storage: When arriving at the destination or the construction site, the product supplier should send personnel to supervise to prevent rough operations when the product is unloaded; try to store the product indoors, and at the same time lay a place on the surface of the storage. Layer isolation layer, such as wood, bedding, foam, etc., to prevent the product from freezing and damp.(3) Cable laying: you should choose to work under the condition of warmer temperature in the middle and afternoon, or do some protection for the cable, especially when laying the cable through the pipe, make sure that the inside and outside of the pipe are smooth in advance, so as not to scratch the wires. .
Well, the above is the introduction about the “causes and preventive measures of cable sheath damage and shedding”, I hope everyone can understand.