... 4.the number of loops:4 1 Application rangeSX1 terminal distribution box is widely used in high-rise buildings, hotels, hospitals, restaurant ... and technology performances3.1 Main specifications3.1.1 Installation types: a. Surface Installation b. Concealed Installation3.1.2 Divided according to ... users no.a. single line: 2, 4, 6, 8, 10, 12, 15, 18b ...