NEC Commercial Electrical Practice Test

What is the maximum weight a lighting fixture can support when being attached to an outlet box?

1. 25 pounds

2. 35 pounds

3. 50 pounds

4. 75 pounds

The correct answer is: 50 pounds

The maximum weight a lighting fixture can support when being attached to an outlet box is determined by the National Electrical Code (NEC) requirements, which specify that standard outlet boxes must support a maximum of 50 pounds for light fixtures. This is based on the structural integrity and safe load-bearing capacity of typical outlet boxes, which are designed to securely hold lights without the risk of failure or falling. When considering light fixtures, it's essential to note that some heavier fixtures may require specific support or additional reinforcement beyond what a standard outlet box can provide. The NEC emphasizes safety, ensuring that fixtures are installed in a manner that prevents hazards, such as electrical shorts or physical injuries resulting from a fixture falling. The other options reflect either insufficient support or exceed the established guidelines per the NEC, thus not aligning with the 50-pound limit set for standard fixture installations. It is critical for electricians and contractors to adhere to these guidelines to ensure both compliance with the code and the safety of the installation.