There are many kinds of wire and cable, flame retardant cable refers to under the specified test conditions, the sample is burned, after removing the test fire source, the flame spread only within a limited range, residual flame or residual burn in a limited time can self-extinguish the cable. Its characteristics are mainly manifested in that, in case of fire, the cable can limit the combustion to a local scope, do not produce spread, keep other various equipment, and avoid causing greater losses.


1. Classification of flame retardant cables

According to the different flame retardant materials of cable, flame retardant cable is divided into two categories: halogen flame retardant cable and halogen free low smoke flame retardant cable.

The insulation layer, sheath, outer sheath and auxiliary materials (wrapping and filling) of halogenated flame retardant cables are all or partially made of halogenated polyethylene (PVC) flame retardant materials, so they have good flame retardant properties.

It is suggested that a large amount of smoke and halogen acid gas will be released when the cable is burned, and the halogen acid gas is corrosive to the surrounding electrical equipment. Rescuers need to wear gas masks before approaching the scene to extinguish the fire. When the cable burns, it causes harm to the surrounding electrical equipment and rescue personnel, which is not conducive to the fire fighting and rescue work, resulting in serious "secondary hazards".

2, flame retardant cable model



3, the selection of flame retardant cable problems

According to the specific characteristics of flame retardant cable design selection and laying construction of flame retardant cable, and should pay attention to the following problems:

(1) Because halogen flame retardant cables (including flame retardant cables, low halogen low smoke flame retardant cables) will release corrosive halogen acid gas when burning, greatly hindering fire fighting work thereby delaying the fire fighting time and aggravating the spread of the fire, it is recommended that halogen free low smoke flame retardant cables should be designed as far as possible in public places with high population density. Any kind of flame-retardant cable can be selected in the operation area with low population density.

(2) The A, B, and C categories of flame-retardant cables cannot be distinguished from their appearance, and rely on manufacturers for supply assurance.

(3) Compared with halogen flame retardant cables, halogen free low-smoke flame retardant cables have the advantages of low corrosion and low smoke, but the electrical and mechanical properties are significantly reduced, and the Tianxing cable suggests that when the cable is laid, the halogen free low-smoke flame retardant cable should have a larger bending radius than the halogen flame retardant cable.

(4) In the design of cable laying, it is not appropriate to lay non-flame retardant cables and flame retardant cables in parallel, and it is not appropriate to lay flame retardant cables of different flame retardant categories in parallel.


The above content is the content that Tianxing cable shares for you in this issue, I hope it will be helpful to you

Qingdao Tianxing Cable Co., Ltd. is a high-tech enterprise specializing in the production of wire and cable in Shandong Province, with more than 150 sets of domestic excellent cable production equipment and testing equipment, excellent production technology, modern testing equipment, to ensure stable product quality and timely supply. The main products of the company are power cables, low smoke halogen free cables, photovoltaic cables, aluminum alloy cables, shielding cables, radiation crosslinking cables, control cables, computer cables, high life cables, flame retardant series wire and cable.

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