For switchboards subject to falling liquids, what enclosure type is ideal?

The ideal enclosure type for switchboards subject to falling liquids is Type 4X. This type of enclosure is specifically designed to offer protection against the ingress of water and moisture, making it suitable for environments where exposure to falling liquids is a concern. Type 4X enclosures are also corrosion-resistant, which adds an extra layer of durability in settings where chemicals or other corrosive substances may be present.

Type 4X combines the properties of a Type 4 enclosure, which is intended for use outdoors and provides protection against windblown dust and rain, with additional features to prevent corrosion. This is particularly important in applications where the switchboard is not only exposed to water but also to corrosive elements that could compromise the integrity of the electrical equipment.

In contrast, Type 1 enclosures are primarily intended for indoor use and offer no protection against falling liquids. Type 3 enclosures are suitable for outdoor use but do not provide the level of water protection or corrosion resistance that a Type 4X enclosure does. Similarly, while Type 4 enclosures provide solid water protection, they do not include the corrosion-resistant features found in Type 4X. Therefore, for switchboards exposed to falling liquids, Type 4X is the best choice.