Hey everyone thanks in advance for all the feed back this site is usually one of the best places to ask questions like this. I'm having problems finding better information about sizing overcurrent protection for low voltage systems. My problem is that I need to protect a battery monitor with a nominal voltage of 48 volts dc. The manual calls for using an inline fuse with an overcurrent protection of five amps or less. After looking at what is readily available I picked up an automobile fuse and inline fuse holder. My problem is I got home to find out that the fuse is rated for 32 volts. Im seeing online that a low voltage DC system is anything under 150 volts. Is it going to be safe to use a 32 volt 5 amp automobile fuse to protect my battery monitor with a nominal voltage of 48 volts DC. About to order an inline fuse holder rated for 600 Volts with a ferraze fuse that can take one amp, but still wanted to post in here to see if anyone could answer my question. Thanks for the feedback.