American style cable junction box
The American style cable distribution box is a cable engineering equipment widely used in the cable distribution network system in North America. It is mainly characterized by one-way door opening and horizontal multi-channel busbar, and has significant advantages such as small width, flexible combination, full insulation, and full sealing. According to the rated current, it can generally be divided into two types: 600A main circuit and 200A branch circuit. The 600A main circuit adopts a screw in bolt fixed connection; The 200A branch circuit adopts a plug-in connection and can be plugged and unplugged with load.
The cable joints used in the American cable distribution box comply with the IEEE386 standard.
Main technical parameters
| 200A circuit parameters | 600A circuit parameters | |
| Rated voltage |
15kV | 15kV |
| Maximum phase to phase voltage |
14.4kV | 14.4kV |
| Maximum relative ground voltage |
8.3kV | 8.3kV |
| 1-minute power frequency voltage |
42kV | 42kV |
| 15 minute DC withstand voltage | 52kV | 52kV |
| Lightning impulse withstand voltage | 75kV | 75kV |
| Minimum corona starting voltage | 11kV | 11kV |
| Rated current |
200A | 600A |
| Rated thermal stability current |
3.5kA/3S | 20kA/2S |
| Rated dynamic stable current | 10kA/0.2S | 50kA/0.3S |
| Partial discharge | ≤10PC/15kV | ≤10PC/15kV |
| Circuit resistance | ≤40μQ | ≤40μΩ |
| Protection level | IP33 | IP33 |



