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Automotive fuses are a class of fuses used to protect the wiring and electrical equipment for vehicles. They are generally rated for circuits no higher than 32 volts direct current , but some types are rated for 42-volt electrical systems .
For example, an AWG 16 fusible link might be used to protect AWG 12 wiring. Electrical fusible links are common in high-current automotive applications. The wire in an electrical fusible link is encased in high-temperature fire-resistant insulation to reduce hazards when the wire melts. [2] [3]
Standards for automotive fuses are published by SAE International (formerly known as the Society of Automotive Engineers). Automotive fuses can be classified into four distinct categories: Blade fuses; Glass tube or Bosch type; Fusible links; Fuse limiters; Most automotive fuses rated at 32 volts are used on circuits rated 24 volts DC and below.
IEC 60269-7 – Low-voltage fuses – Part 7: Supplementary requirements for fuse-links for the protection of batteries and battery systems; In IEC standards, the replaceable element is called a fuse link and the assembly of fuse link and fuse holder is called a fuse. North American standards call the replaceable element only the fuse.
A thermal fuse is a cutoff which uses a one-time fusible link. Unlike a thermal switch which may automatically reset itself when the temperature drops, the thermal fuse is more like an electrical fuse : a single-use device that cannot be reset and must be replaced when it fails or is triggered.
Linemen from Huntsville Utilities replace a blown cutout fuse with a non-conductive extending pole tool on July 10th, 2022 in Huntsville, Alabama. Each fuse holder typically has an attached pull ring that can be engaged by a hook at the end of a fiberglass hot stick operated by a lineworker standing on the ground or from a bucket truck , to ...