What voltage must the transformer supply to the Main Distribution Panel (MDP)?

The transformer must supply a voltage of 120/240 volts to the Main Distribution Panel (MDP) because this configuration allows for both the standard 120 volts for general power needs and the 240 volts often required for larger appliances and equipment, such as HVAC systems or industrial machinery. The split-phase design of the transformer provides both voltage levels, which is essential for meeting varying electrical load demands in a facility.

In residential and commercial settings, the distribution panel often utilizes this combination to ensure that different circuits can be powered appropriately without overloading the system. Utilizing 120/240 volts allows the MDP to service a wider range of electrical devices while ensuring compatibility with standard outlet configurations, increasing versatility and efficiency in power distribution.