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Low voltage controls are usually designed to operate at no more than:

  1. 25 volts

  2. 80 volts

  3. 120 volts

  4. 230 volts

The correct answer is: 25 volts

Low voltage controls are typically designed to operate at a maximum of 25 volts, which aligns with industry standards for safety and effectiveness in control systems. The establishment of this limit is rooted in the principle of reducing the risk of electric shock and ensuring that the controls can be operated safely in various environments. In many applications, lower voltage controls help prevent electrical hazards while still providing the necessary power for control functions. This standard is particularly relevant in systems where operators might come into direct contact with the controls. Higher voltages, like 80 volts or above, may introduce increased risk factors, including shock hazards and equipment vulnerabilities. Therefore, the 25-volt limit is a critical guideline in the design and implementation of low voltage control systems, ensuring compliance with safety regulations while maintaining operational integrity within electrical installations.