The minimum number of electrical fuses required to be carried as emergency equipment is three. This guideline ensures that a driver is equipped to handle common electrical failures that may occur while on the road. Having three fuses allows for the replacement of at least one fuse in multiple circuits if needed, ensuring that the vehicle can operate safely without leaving the driver stranded due to an electrical issue.
Carrying more than one fuse is crucial because, in the event of a blown fuse, a driver may need to replace fuses for critical systems such as lights or the engine, which are essential for safe operation. This requirement emphasizes preparedness and safety, allowing the operator to address potential issues without delays.
The other options suggest a greater or lesser number of fuses, which would either not comply with regulatory standards or not provide sufficient redundancy for electrical issues during a journey. Thus, having three fuses strikes a balance between safety and practicality for CDL drivers.