The steel box of waterproof junction box, the steel mounting plate, the original non-conductive metal base in waterproof distribution box and the outer shell of waterproof electrical box must be grounded for protection, and the protective neutral wire should be. The steel box of waterproof junction box, the steel mounting plate, the original non-conductive metal base in waterproof distribution box and the outer shell of waterproof electrical box must be grounded for protection, and the protective neutral wire should be. An earthing system (internationally ) or grounding system (US) connects specific parts of an electric power system, such as the conductive surfaces of equipment, with the ground for safety and functional purposes. The choice of earthing system can affect the safety and electromagnetic. The wiring of distribution boxes in Europe should strictly follow the EN 60439 series standard (low-voltage switchgear standard) and local electrical codes (such as VDE in Germany and NFC in France). The core requirements focus on four dimensions: safety protection, wiring specification, clear. First, we review and compare medium-voltage distribution-system grounding methods. The box-type transformer is available in multiple structural forms, such as "MU" and "PIN" types. Properly installed waterproof distribution box in outdoor solar PV application, demonstrating IP66-rated enclosure with sealed cable gland entries and stainless steel mounting hardware on concrete substrate. Each DISTRIBUTION BOX and controller must be grounded. 26 mm 2 (10 AWG) ground wire must be used, and in all other markets a 6 mm 2 must be used.
