What type of voltage is required in a commercial building housing business machines and computers?

• A. 120/240 V
• B. 110/208 V
• C. 120/208 V
• D. 277/480 V

Answer: (B)

In commercial buildings that house business machines and computers, 110/208 V is a common voltage requirement. This voltage level is typically used for three-phase power systems, which are beneficial for running various types of machinery and equipment found in commercial environments.

The 110/208 V configuration allows for efficient operation of smaller equipment and devices that may utilize 120 V circuits. Additionally, this voltage level supports more substantial loads when using three-phase power, providing a balanced electrical supply that is essential for optimal performance and reduced electrical costs in commercial settings.

This voltage is often associated with the secondary side of a transformer that steps down higher primary voltages (such as 480 V) into a range that is safe and effective for use in standard commercial applications. This makes it a practical choice for powering everything from lighting to computers while ensuring compatibility with various equipment load requirements.

In contrast, the other voltage options might be too high or not typically used in standard situations involving office machines and computers, thus making them less suitable for typical applications found in commercial environments.