Which statement about Class II equipment is true?

• A. Class II equipment has double or reinforced insulation and does not require an earth connection.
• B. Class II equipment requires protective earth.
• C. Class II equipment uses a PEN conductor.
• D. Class II equipment uses exposed metal parts.

Answer: (D)

Class II equipment is designed with isolation that protects you from electric shock without relying on a protective earth. It uses double insulation or reinforced insulation between live parts and the outside, so the outer surface cannot become live and no earth connection is required for safety. That makes the statement describing double insulation and no earth connection correct. The other ideas don’t fit Class II: a protective earth isn’t required, a PEN conductor isn’t used inside these devices, and exposed metal parts aren’t a defining feature of Class II safety design.