What voltage from the power outlet is typical for dental X-ray equipment?

What voltage from the power outlet is typical for dental X-ray equipment?

• A. 110 V
• B. 120 V
• C. 240 V
• D. 90 V

Answer: (B)

The main idea here is that dental X-ray equipment is designed to run from standard wall outlets. In the United States, the typical nominal mains voltage is 120 volts AC, with the actual line voltage often hovering around 115–125 V. The X-ray generator inside the unit uses that incoming power (through internal circuitry like transformers or inverters) to produce the high voltage needed for X-ray production. So the equipment is built to plug into a 120 V supply, making 120 V the usual value clinicians expect. A 240 V supply would be characteristic of different regions or setups, and 90 V or 110 V aren’t the common nominal values for the standard clinic outlet in the US.

The main idea here is that dental X-ray equipment is designed to run from standard wall outlets. In the United States, the typical nominal mains voltage is 120 volts AC, with the actual line voltage often hovering around 115–125 V. The X-ray generator inside the unit uses that incoming power (through internal circuitry like transformers or inverters) to produce the high voltage needed for X-ray production. So the equipment is built to plug into a 120 V supply, making 120 V the usual value clinicians expect. A 240 V supply would be characteristic of different regions or setups, and 90 V or 110 V aren’t the common nominal values for the standard clinic outlet in the US.