Push buttons are considered light or heavy duty based on...

• A. Their environmental rating
• B. Their current-carrying capability
• C. Their physical size
• D. Their color

Answer: (B)

Push buttons are categorized as light- or heavy-duty by their current-carrying capability—the amount of current their contacts are designed to switch safely. This rating, usually given in amperes, determines which electrical loads the button can control without overheating or failing. Light-duty buttons suit small control circuits with low current, while heavy-duty buttons are built to handle higher currents and tougher duty cycles, like starting motors or equipment on a conveyor. The other factors listed don’t define duty category: environmental rating (IP rating) covers protection from dust and water, not electrical load; size and color are cosmetic or related to form factor, not the electrical capability. Understanding this helps ensure the right button is used for the circuit’s current demands.