Generally speaking, when the ring network cabinet is placed indoors or in a distribution room, the separately built space can play a protective role, so there is no need to consider the shell design separately.However, when there is no additional sheltering building, the ring network cabinet needs to be placed outdoors, and the choice of shell needs to be taken into consideration.

There are many uncertain factors in the outdoor environment that affect the operation of the ring network cabinet, such as rain, storms, lightning, animal and plant damage, etc. In this case, the ring network cabinet needs to be fully protected to isolate these environmental impacts and extend its service life.Common types of shells are GRC, aluminum-zinc plate, and stainless steel (304, 201).

GRC shell is common in residential areas. The non-metallic box transformer shell made of GRC material has greater plasticity and is not restricted in size changes.Because of its short construction time, it will not affect residents' travel too much during the construction or renovation of the community, and the period of noise generated during construction is also short.It occupies a small area and has a more beautiful appearance. It will not damage the landscape too much in communities with high requirements for environmental beauty.

Alu-zinc plate, also called galvanized plate, is a metal shell composed of an aluminum-zinc alloy structure. It has a variety of high-strength characteristics: corrosion resistance, high temperature resistance, and easy to paint. These characteristics make this shell have a longer service life and more suitable for some places with complex outdoor environments.

Stainless steel shell (304, 201) is also one of the more common shell materials.Now stainless steel is one of the common tableware or home appliance materials in daily life. It also has good corrosion resistance when used as the shell of the ring network cabinet. Therefore, it is the shell material of choice in many outdoor environments.