Industrial plugs and sockets come in the following current ratings: 16A, 32A, 63A, and 125A. They are available in 3-pin, 4-pin, and 5-pin. With an increasing investment in research and development (circa 5% of sales) and more than 3,700 active patents, the Legrand Group is focused on maintaining a high rate of new product launches that present innovative solutions to the market. 21 of the National Electrical Code® (NEC®) covers electrical system. Wide range of explosion-protected plugs and sockets, plug connectors. STAHL's plugs and sockets and plug connectors can be used to conduct, connect and distribute electrical energy without the risk of explosion. Offering a wide variety of products, this is one of the most extensive ranges on the. ABB has expanded its range to include fire protection Mantle Enclosures,and Fire Protection Doors which, in addition to having a fire resistance duration that conforms to DIN 4102 Part 2 (F30/F90), also guarantee to check fire load (I30/I90) and maintain functionality (E30/E90). Safety-related. Industrial plugs, sockets, and couplers are mainly divided into four categories: plugs, sockets, connectors, and appliance inlets, and are generally referred to as industrial plugs and sockets. Socket-outlets with IP55 degree of protection have a bayonet fastening cover, traditionally defined as “water-tight”, and must be used with with IP67 plugs (with locking ring and gasket) to guarantee a high protection of the.