What is the minimum calculation for sign and outline lighting outlets per required branch circuit?

The minimum calculation for sign and outline lighting outlets per required branch circuit is based on the National Electrical Code (NEC) guidelines. For sign and outline lighting, the NEC specifies that the minimum load calculation should account for the maximum expected demand, which is typically higher due to the nature of these installations.

The selection of 1200 volt-amperes as the correct answer aligns with industry standards that dictate adequate power provision to ensure operational efficiency and safety for these types of electrical outlets. Signs and outline lighting often require more robust circuits to accommodate their starting currents and operational demands, hence the elevated minimum calculation. This standard ensures that circuits are not overloaded, which is critical for maintaining electrical safety and reliability in commercial applications.

In contrast, the other options do not meet the NEC requirements for such installations. They are lower than what is typically necessary for the demands of sign and outline lighting, which can lead to insufficient power supply and increased risk of circuit failure or safety hazards. Adhering to the highest standard, like the 1200 volt-amperes, ensures that the installations function properly under typical load conditions.