In electrical safety, which plug type is required for tools that are not double-insulated?

In electrical safety, which plug type is required for tools that are not double-insulated?

• A. Two-Prong Plugs
• B. Three-Prong Plugs
• C. GFCI Plugs
• D. No Plugs

Answer: (B)

The key idea is grounding for safety. If a tool isn’t double-insulated, it can have a metal housing that could become live if a internal fault occurs. A three-prong plug provides an equipment grounding conductor that connects the tool’s chassis to earth through the outlet. This grounding path allows fault current to flow safely back to the source, so a breaker trips or a fuse blows instead of someone getting a shock. A two-prong plug has no ground, which leaves the metal parts energized and presents a higher shock risk. GFCI protection helps reduce shock risk by interrupting current if a fault is detected, but it isn’t a plug type that provides the grounding connection itself. No plug is unsafe and not acceptable for a tool that isn’t double-insulated.

The key idea is grounding for safety. If a tool isn’t double-insulated, it can have a metal housing that could become live if a internal fault occurs. A three-prong plug provides an equipment grounding conductor that connects the tool’s chassis to earth through the outlet. This grounding path allows fault current to flow safely back to the source, so a breaker trips or a fuse blows instead of someone getting a shock. A two-prong plug has no ground, which leaves the metal parts energized and presents a higher shock risk. GFCI protection helps reduce shock risk by interrupting current if a fault is detected, but it isn’t a plug type that provides the grounding connection itself. No plug is unsafe and not acceptable for a tool that isn’t double-insulated.