Branch circuits are permitted to supply the loads they are rated for. Which statement best reflects this?

• A. They may supply loads beyond their rating
• B. They are permitted to supply the loads they are rated for
• C. They must always be derated to 80%
• D. They can only supply lighting loads

Answer: (B)

Branch circuits have an ampacity that defines the maximum current they can safely carry. They can serve any combination of loads as long as the total current does not exceed that rating. This is why the statement that they are permitted to supply the loads they are rated for is the best reflection: the circuit may supply those loads, but not more. It’s not limited to lighting, and it’s not a blanket rule to derate to 80%—derating only applies in specific situations (like continuous loads or certain conductor arrangements) beyond the basic principle of not exceeding the circuit’s rated capacity.