Why Choose a Good Quality THHN Cable?

THHN Cable explosion accidents occur frequently, which may cause fires and explosions. There are many reasons why cables explode. If not dealt with in time, it may lead to a more serious accident. In order to avoid this, we need to have a certain understanding of the causes of cable explosions in order to prevent them more effectively.

1. Cable head burning

Because the surface of the cable head is damp and dirty, the ceramic sleeve of the cable head is broken and the distance between the lead wires is too small, which leads to flashover and fire, causing the surface insulation of the cable head and the insulation of the lead wires to burn.

2. Short circuit fault caused by edge damage

The protective lead sheet of the power cable is damaged during laying or the cable insulation is mechanically damaged during operation, which causes the insulation breakdown between the cables or between the lead sheets, and the resulting arc causes the insulating material and the outer protective layer of the cable to burn and catch fire.

3. The cable is overloaded for a long time

In long-term overload operation, the operating temperature of the cable insulation material exceeds the maximum allowable temperature for normal heating, causing the cable insulation to age and dry. This phenomenon of insulation aging and drying usually occurs throughout the cable run. Due to the aging and drying of the cable insulation, the insulating material loses or reduces its insulating and mechanical properties, so it can easily break down and burn, even in many places along the entire length of the cable.

4. External fire sources and heat sources cause cable fires

Such as the spread of fire in the oil system, the spread of the explosion and fire of the oil circuit breaker, the spontaneous combustion of pulverized coal in the boiler pulverizing system or the coal conveying system, the baking of the high temperature steam pipeline, the chemical corrosion of acid and alkali, welding sparks and other fires, all of which can cause the cable fire.

5. The immersed cable leaks or leaks due to the height difference

When the oil-immersed cable is laid with a large height difference, the phenomenon of oil dripping from the cable may occur. As a result of the flow, the upper part of the cable is dried up due to the loss of oil, the thermal resistance of this part of the cable increases, and the paper insulation cokes and breaks down in advance. This cable has been gradually phased out, so it is recommended that everyone should replace it as soon as possible before causing an accident.

Considering the complexity of the cable use environment, the YJV XLPE cable produced by Asia Cable is a good choice. This kind of cable laying is not only not affected by the drop, but also has high mechanical strength, good environmental stress resistance, excellent electrical performance and The characteristics of chemical corrosion resistance can effectively avoid the occurrence of accidents such as cable explosion.

6. Insulation breakdown of inter-connector box

The intermediate joint of the cable joint box is oxidized, heated and glued during operation due to loose crimping, weak welding or improper selection of joint materials; when making the intermediate joint of the cable, the quality of the insulating agent poured into the intermediate joint box does not meet the requirements. When the insulating agent is poured, there are air holes in the box, and the cable box is poorly sealed, damaged, and leaks.

All of the above factors can lead to insulation breakdown, creating a short circuit that can cause the cable to explode and catch fire.

Therefore, we need to carry out line safety inspections on a regular basis. Professionals should be invited to conduct a thorough inspection at least once a year for wires, electrical equipment, etc., especially for wires with a long service life at the joints. If the wires are found to be aging, damaged, poor insulation and other unsafe conditions, they must be repaired and replaced in time to ensure electricity consumption. Safety.

Finally, Asia Cable reminds everyone that when purchasing thhn wires and cables, you must look for regular manufacturers, check the quality, and do not buy some unqualified wires because of cheap prices.