Which of the following is NOT a factor when selecting fuses?

When selecting fuses, various factors must be considered to ensure proper protection and functionality within an electrical system. Voltage rating and current rating are critical because they define the maximum voltage the fuse can handle and the maximum current it can carry before blowing, respectively. Time delay is also important because certain applications may require a fuse that can withstand temporary current surges without blowing, allowing for normal operational fluctuations.

Color coding, however, is not a technical factor in the selection process for fuses. While color codes can indicate certain characteristics like the manufacturer or type of fuse, they do not influence the operational capacities such as voltage or current ratings. Therefore, color coding does not play a role in the fundamental decision-making process when choosing a fuse for electrical protection. It serves more as an identifier rather than a selection criterion based on electrical performance.