In what type of enclosure can switchboards and panelboards subject to ice coverage be installed?

Switchboards and panelboards that are subject to ice coverage must be installed in enclosures that can protect against the effects of specific environmental conditions, including moisture, corrosion, and ingress from ice. Type 3S and 3SX enclosures are designed for outdoor use and are specifically rated for protection against rain, sleet, and snow. This makes them suitable for locations where ice accumulation can occur, thereby preventing moisture intrusion that can lead to equipment damage or malfunction.

The Type 3S enclosure is designed for outdoor use where the equipment may be exposed to ice and allows for effective drainage and protection. Type 3SX enclosures go a step further by offering increased protection against wind-driven rain and are often used in areas where heavy ice or snow might hinder the functionality of electrical equipment.

In contrast, other enclosure types such as Type 1, Type 4, and Type 12 do not provide the same level of protection against the environmental hazards presented by ice. Type 1 enclosures are only suitable for indoor use and may not withstand outdoor conditions. Type 4 enclosures are suitable for outdoor use but may not have the same level of sealing against ice conditions as Type 3S or 3SX. Type 12 enclosures are designed