This American National Standard is an adoption of IEC 60529, Edition 2. 0, Degrees of protection provided by enclosures (IP Code) and was developed and approved in accordance with procedures set forth by the American National Standards Institute. A distribution box is a low-voltage electrical enclosure that receives incoming power and distributes it safely to multiple outgoing circuits through protective and switching devices such as MCBs, RCDs, RCBOs, fuses, isolators, busbars, neutral bars, earth bars, and surge protective devices. The. The GB-terminal box, both distribution box and empty enclosure, is manufactured of high impact resistance, glass-fibre reinforced polyester SMC & DMC providing extraordinary stability and corrosion resistance. This Standard contains all the original text from IEC. Ingress Protection - IP - ratings are developed by the European Committee for Electro Technical Standardization (CENELEC) (described IEC/EN 60529), and specifies the environmental protection and enclosure provided. Other colours without. Boxes and enclosures for electrical accessories for household and similar fixed electrical installations - Part 22: Particular requirements for connecting boxes and enclosures IEC 60670-22:2024 applies to boxes, enclosures and parts of enclosures (hereafter called "boxes" and "enclosures") for.