What type of enclosures should be provided for switches and circuit breakers in Class II, Division 1 locations?

In Class II, Division 1 locations, it is essential to use identified enclosures for switches and circuit breakers to ensure safety in environments where combustible dust may be present. Identified enclosures are specifically designed and tested to provide the necessary protection against the ignition of dust in these hazardous locations. They conform to specific standards that ensure they can contain any explosions or prevent sparks from escaping, which is vital in preventing ignition of the dust.

Standard enclosures do not have the same level of protection and may not be suitable for containing combustible materials, which can lead to safety risks in Class II environments. Non-identified enclosures lack the necessary certifications and tests for these hazardous conditions, making them inappropriate for use. While explosion-proof enclosures are indeed designed for use in hazardous locations, the term "identified enclosures" specifically refers to those that meet the necessary requirements to operate safely in areas subject to combustible dust, thereby making it the most suitable answer for the question.