The SD-ACS construction site distribution box is suitable for temporary electricity consumption on the construction site and outdoors, and meets the requirements of "three-level power distribution, two-level leakage protection, one machine, one brake, one leakage and one box". The SD-ACS construction site distribution box is suitable for temporary electricity consumption on the construction site and outdoors, and meets the requirements of "three-level power distribution, two-level leakage protection, one machine, one brake, one leakage and one box". How to Choose a Site Level 3 Distribution Box(Purchase Notes). Select the rated current of the main switch for the Level 3 Distribution Box according to the configuration of the on-site Level 2 Distribution Box. Example: If the outgoing current of the Level 2 Distribution Box is 63A, select a 63A. Yueqing Beigang Industrial Socket Distribution Box is an electrical distribution device that adopts a plug-in method, which is more convenient and practical than traditional terminal wiring. The built-in circuit breaker group ensures working performance and reliability, and is easy to use and safe. Other types of cables that can be used on construction sites are PVC cables and H07RN-F cables. Guangzhou,Guangdong Wuxi,Jiangsu Jiangsu WENZHOU QIUPU ELECTRIC POWER CO. Sourced directly from a reputable manufacturer and supplier, I can assure.