Enclosure Distribution Box Introduction:
With IEC60439-3 standard, LWHT series distribution box is attractive and durable, safe and reliable, which is widely used in various places such as factories, mansions, residences, shopping centers and so on.
Enclosure Distribution Box UL flame retardancy is classified as follows:
UL94V0 and UL94V5 are plastic "insurance premium" grading methods that allow the sample to quickly self-extinguish after ignition by removing the flame to a non-burning melt drop within a certain time interval (i.e., a burning melt drop on a cotton pad located one foot below the test sample cannot ignite the cotton). Flame length is 3/4 inch and two burns are required for each flammability test using UL94V0, V1, and V2.
UL94V1 is assessed in a similar way to V0, but with a longer self-extinguishing time, allowing the melt to drip onto the cotton mat but not ignite it.
UL94V2 is the same as V1, except that it allows burning droplets to ignite cotton a foot below.
UL94 V5 is the most rigorous test method, he designed the actual life of plastic products in the flame, the test requires a flame length of 5 inches, the test sample is subjected to 5 times of combustion, during which no melting and falling, no obvious distortion of the test sample, and no burning holes.
The following table lists Ul combustion test methods for several samples of specified material thickness and the requirements for each method. If the plastic is not like PVC itself has flame retardant, it is often necessary to flame retardant modification, which may lead to changes in its physical properties, the modified plastic toughness will be greatly reduced, can not withstand the impact of high occasions. And its other physical properties will also be reduced.
Household Enclosure Distribution Box is usually also called lighting box or strong electricity box, he belongs to the end protection device of household electricity, the inlet end is connected to the outlet side of the electricity meter, the outlet end is connected to our household electricity. It is the last guarantee to protect the safety of our electricity.
The main function of the household distribution box is to cut off and connect the power supply, effectively control each electricity line, to achieve the purpose of safe use of electricity. Household for indoor control distribution box, its structure is generally composed of leakage switch equipment and metering equipment.
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