First of all, if this type of junction box need to be waterproof, then its raw material should have a waterproof effect. At present, the main waterproof materials are plastic, rubber,metal and others. It is obvious that metal is not very suitable to be made as junction box because metal is a conductor. Using it as a junction box’s raw material can easily lead to leakage accidents. And rubber material is hard to be molded and easy to be aging. So plastic material is better choice than the others....
In global terminals under the situation of technical change speed ,the connector of the maturity of the product is widely used in various industries of national economy,as China becomes the factory of the world,the rapid development of manufacturing for the terminal product provides larger and larger market space .However,today the terminal market can also be said to be the world of the foreigners . Ashkenazi and other European and American countries occupy a relatively large market share ....
SPD is designed to limit transient over-voltages of atmospheric origin and divert current waves to earth, so as to limit the amplitude of this over-voltage to a value that is not hazardous for the electrical installation and electric switch gear and control gear.
IP Ratings: (Ingress Protection or International Protection) - The Ingress Protection rating system is a classification system showing the degrees of protection from solid objects and liquids. Waterproof connectors can be classified into different kinds of grades. The two principal grade classifications for waterproof connectors are IP67 and IP68....
Through-type terminal blocks, in terms of lighting market, there are many types, but the most used is the white 12pin strip terminal block, the spacing includes: 8MM, 10MM, 12MM, 13.5MM, etc., lighting manufacturers mainly use this through-type terminal blocks in ballasts for electrical connection.
The IP Code, International Protection Marking, IEC standard 60529, sometimes interpreted as Ingress Protection Marking, classifies and rates the degree of protection provided against intrusion (body parts such as hands and fingers), dust, accidental contact, and water by mechanical casings and electrical enclosures. It is published by the International Electrotechnical Commission (IEC). The equivalent European standard is EN 60529....
The reason why buried lights still leaking? It could be summarized as following 4 reasons:
① unreasonable design
② defective material
③ defective process
④ wrong installation