Industrial Plug 1)Poles:2P+E, 3P+E, 3P+N+E 2) ... Industrial PlugOur items comply with IEC60309 standard. 1)Industrial socket, plug, connector. 2)pole: 3pole (2P+E), 4Pole(3P+E), 5pole ... imported from Japan, welcome inquiries from all over the world. plug socket box