Outdoor electrical enclosures are cabinets made of a variety of materials which are used for storing electrical circuitry. These are very important to the way everything's run and if there's electricity then you'll find an enclosure in some capacity.
There are lots of different types of 'outdoor' enclosures and these can be outside your house attached to the side of your house. There are others can be inside the house but not in any particularly visible areas, such as in the inside of the garage.
There are of course other types of outdoor electrical cabinets which inhabit most roads and streets in modern countries. These contain electrical wires as well as usually broadband cables and wires. As you can imagine these are all very important to most homes who like to enjoy electricity and broadband.
Outdoor enclosures are made out of materials which allow for the protection of the vulnerable circuitry inside. This means they're usually made of a durable material, generally stainless steel – but they can be made of a variety of different metals and even non metals. It's not too uncommon to find different designs made out of metals like aluminum.
What is much more uncommon are designs made out of materials such as plastics or even timber. Outdoor electrical enclosures such as these are rare and usually custom designed and built. They're considered rare usually because of their low protection capabilities and much shorter life span. They're often used for their aesthetic properties than posing any kind of actual benefit.