Having a solid weatherproof, long lasting junction box is a must when you need to protect electrical components from the many harsh elements of outdoor environments.
NEMA and UL have standard that meet the needs of a outdoor electrical junction box.
You can also meet these standards and have your weatherproof junction boxes made to order to accommodate custom sizes and special needs.
Choosing a corrosive resistant material such as aluminum or stainless steel is a must for weatherproof junction boxes and in fact a standard requirement to comply with NEMA or UL specifications along with rubber gasket seal inside the access door to lock out all moisture and protect the components inclosed in the electrical junction box.
The NEMA type 4X is a popular example of a weatherproof electrical junction box. Formed from steel, the nema4x is ten covered and finished with stainless steel. The non corrosive nature of stainless steel along with a gasket sealed door or cover ensure proper protection from rain, snow and ice while protecting the components inside the junction box from the elements and personnel from coming in contact with the components.