Do overcurrent protective device (OCPD) selection decisions affect arc-flash hazards?

When considering the impact of overcurrent protective device (OCPD) selection on arc-flash hazards, the selection of these devices indeed plays a significant role in both the prevention and management of arc-flash incidents. Choosing appropriate OCPDs can affect the speed at which they respond to overcurrent conditions, thus influencing the energy released during an arc flash.

Option C accurately reflects that the choice of OCPDs can have both positive and negative effects on arc-flash hazards based on their settings and application. For instance, if an OCPD is selected with a higher trip rating than necessary, it may not respond quickly enough to a fault condition, potentially resulting in a more severe arc flash incident. On the other hand, a properly rated OCPD can help mitigate the energy released during such an event, reducing the overall hazard.

In contrast, the other options do not capture the complexity of the relationship between OCPD selection and arc-flash hazards effectively. Positioning this choice highlights the importance of thoughtful selection and calibration of OCPDs to enhance workplace electrical safety.