The Identification Method of Low Smoke Zero Halogen Power Cables

Since the raw materials of low smoke zero halogen power cables are more expensive than that of ordinary wires and cables, and in terms of  the setting of the production machines, the production time of low smoke zero halogen power cables is about 30%-50% longer than that of ordinary wires and cables, which is relatively low in efficiency.

Therefore, the price of low smoke zero halogen power cables is about 10%-20% higher than that of ordinary cables. Some informal cable manufacturers sell low smoke zero halogen power cables at low prices, making customers be taken in. So it is necessary to learn how to identify low smoke zero halogen power cables, and the identification of low smoke zero halogen power cables mainly lies in the identification of insulating materials:

1. Combustion method

Judging whether the cables are flame retardant wires or flame retardant power cables according to whether they are easy to burn; Distinguishing their flame colors according to whether they burn; According to whether there is smoke and the amount of smoke to determine whether they are low smoke zero halogen power cables, and if there is smoke, distinguish the color of the smoke. For example, whether the smoke is clear smoke or the smoke containing carbon ash; whether there is molten glue dripping, and if so, whether the molten glue continues to burn and what kind of smell is produced when burning.

Teflon: It softens and deforms when exposed to fire, it has wrinkling thin layer, a small amount of coke and slightly coke smelling when burns, also it is incombustible.

PVC: It has green flame mask when burns and gives off white smoke with the smell of hydrochloric acid when softens. It is self-extinguishing plastic and will sink when placed in water.

PE: It burns with blue light mask, molten glue dripping as well as the smell of candles, and its burning area is molten transparent. Besides, it will float when placed in water.

PP: It burns with blue light mask，molten glue dripping as well as the smell of kerosene, and its burning area is molten transparent. Besides, it will float when placed in water.

PU: It gives off black smoke and drips molten glue when burns. Also, it has no scorch, no smell of nitrogen and oxygen compounds, but the property of prolonged burning.

Nylon: It burns with blue light mask and the smell of burning hair. It is molten material and has the characteristics of self-extinguishing.

Silicone category: It is tasteless and burns with thick white smoke and white residual ash. Also, it has the characteristics of self-extinguishing.

2. Hydrometry

Density comparison method is based on the density of water. Placing the  plastic material in water, if it sinks, the density of the plastic is greater than that of water, while if it floats, the density of the plastic is less than that of water. This method can be used in conjunction with other methods.

The above two methods can easily test flame retardant power cables, flame retardant wires, low smoke zero halogen power cables as well as and low smoke zero halogen wires.