What voltage drop should not be exceeded for a branch circuit supplying a 10 ampere load?

To determine the appropriate voltage drop for a branch circuit supplying a 10 ampere load, the calculation is typically based on the National Electrical Code (NEC) recommendations, which suggest that a voltage drop of 3% is a common limit for branch circuits.

For a branch circuit with a 10 ampere load, the calculation involves the supply voltage. Assuming a standard voltage of 120 volts, the maximum allowable voltage drop at 3% would be:

0.03 x 120 volts = 3.6 volts.

This value is significant for maintaining the efficiency of the electrical system and ensuring that electrical devices operate correctly without experiencing performance issues due to insufficient voltage.

Therefore, the correct answer reflects a voltage drop that should not be exceeded to avoid detrimental effects to the operation of connected devices and to comply with safety standards. It is essential to manage voltage drop within specified limits for the reliability and longevity of electrical installations.