ISO 18616-1:2016 specifies the four main types of reusable, rigid plastic distribution boxes for general purpose application in the fields of handling, transport, storage and display of products in distribution systems from the point of manufacture to the point of retail services:ISO 18616-1:2016 specifies the four main types of reusable, rigid plastic distribution boxes for general purpose application in the fields of handling, transport, storage and display of products in distribution systems from the point of manufacture to the point of retail services:ISO 18616-1:2016 specifies the four main types of reusable, rigid plastic distribution boxes for general purpose application in the fields of handling, transport, storage and display of products in distribution systems from the point of manufacture to the point of retail services: a) rigid. of national committee technical been bodies). The work of preparing International t e right Electrotechnical interested in federation on a subject committee. You must make safety your top priority when working with low voltage distribution boxes. Design requirements help you follow important standards like. What is a Distribution Box? A distribution box, or DB box, is a circuit breaker enclosure. It is a vital part and central hub of any electrical system. Whether it's a home, office, or factory. Explosion-proof distribution boxes are mainly used in coal mines, fire stations, petroleum, petrochemical installations and textile and other flammable and explosive places.