For a branch circuit supplying several fluorescent luminaires, in- line fuseholders with fuses that are installed in one of the luminaire enclosures will protect the _ against overload. \( \begin{array}{l}\text { I. ballast II. branch circuit } \\ \text { Select one: } \\ \text { a. I only } \\ \text { b. II only } \\ \text { c. both I \& II } \\ \text { d. neither I nor II }\end{array} \)

To determine what the inline fuseholders with fuses protect against overload in a branch circuit supplying fluorescent luminaires, let's analyze the options: 1. **Ballast**: The ballast is a component in fluorescent lighting that regulates the current to the lamps. If the ballast is overloaded, it can fail or cause the lamps to flicker or not operate correctly. Fuses can protect the ballast from excessive current. 2. **Branch Circuit**: The branch circuit refers to the wiring and components that distribute electrical power to the luminaires. Overload protection is essential to prevent overheating and potential fire hazards in the wiring. Now, let's evaluate the options: - **I. ballast**: The fuses can protect the ballast from overload. - **II. branch circuit**: The fuses can also protect the branch circuit from overload. Since the fuses provide protection for both the ballast and the branch circuit, the correct answer is: **c. both I & II**.