Renewable fuses (rewirable or cartridge) allow user replacement, but this can be hazardous as it is easy to put a higher-rated or double fuse element (link or wire) into the holder (overfusing), or simply fitting it with copper wire or even a totally different type of conducting object (coins, hairpins, paper clips, nails, etc.) to the existing carrier. This is one type of network cabling used to connect devices in a small area, typically a home, an office, or even data centers. They are compatible with various brands, including Honda, Mazda, Nissan, Mitsubishi, Toyota and even Tesla. To ensure safe and predictable operation, system components are controlled with generators, switches, circuit breakers and loads. Some types of circuit breakers must be maintained on a regular basis to ensure their mechanical operation during an interruption. Adaptors which allow the use of non-BS 1363 plugs, or more than two BS 1363 plugs, must be fused. The blown fuse must be replaced with a new device which is less convenient than simply resetting a breaker and therefore likely to discourage people from ignoring faults. Element window - a small window built into the fuse body to provide visual indication of a blown element.

High-voltage fuses are used to protect instrument transformers used for electricity metering, or for small power transformers where the expense of a circuit breaker is not warranted. A circuit breaker at 115 kV may cost up to five times as much as a set of power fuses, so the resulting saving can be tens of thousands of dollars. But as essentially all DC DC converters (that can be bought by end customers!) are cheap chineses parts (sorry), what is electric cable the chances of finding something better is very slim. The hot gases are then explosively expelled out of the end(s) of the fuse. Indicating disc - a coloured disc (flush mounted in the end cap of the fuse) falls out when the element is blown. Indicating pin or striker pin - extends out of the fuse cap when the element is blown. High-power fuse means that these fuses can interrupt several kiloamperes. High rupturing capacity fuses can be rated to safely interrupt up to 300,000 amperes at 600 V AC. For example, fuse holders for North American class RK fuses have a pin that prevents installation of similar-appearing class H fuses, which have a much lower breaking capacity and a solid blade terminal that lacks the slot of the RK type.

In the United States and Canada, low-voltage fuses to 1 kV AC rating are made in accordance with Underwriters Laboratories standard UL 248 or the harmonized Canadian Standards Association standard C22.2 No. 248. This standard applies to fuses rated 1 kV or less, AC or DC, and with breaking capacity up to 200 kA. All fuses of different technologies tested to meet IEC standards will have similar time-current characteristics, which simplifies design and maintenance. Such tampering will not be visible without full inspection of the fuse. One form of fuse box abuse was to put a penny in the socket, which defeated overcurrent protection and resulted in a dangerous condition. I assume it was put there as ballast. There are two styles of fuse base that can be screwed into these units: one designed for rewirable fusewire carriers and one designed for cartridge fuse carriers. Automotive fuses can be mounted in fuse blocks, inline fuse holders, or fuse clips. On the other hand, replacing a fuse without isolating the circuit first (most building wiring designs do not provide individual isolation switches for each fuse) can be dangerous in itself, particularly if the fault is a short circuit. Medium-voltage fuses are also used to protect motors, capacitor banks and transformers and may be mounted in metal enclosed switchgear, or (rarely in new designs) on open switchboards.

Pole-mounted distribution transformers are nearly always protected by a fusible cutout, which can have the fuse element replaced using live-line maintenance tools. Some manufacturers of medium-voltage distribution fuses combine the overcurrent protection characteristics of the fusible element with the flexibility of relay protection by adding a pyrotechnic device to the fuse operated by external protective relays. When the fuse blows, heat from the arc causes the boric acid to evolve large volumes of gases. When the fuse element blows, the indicating pin extends to activate the micro switch or relay, which, in turn, triggers an event. Fuse wire was never used in North America for this reason, although renewable fuses continue to be made for distribution boards. In medium-voltage distribution systems, a power fuse may be used to protect a transformer serving 1-3 houses. This pole supports: - Three-phase open-wire primary electric distribution. The pole attachment clamp supports the fiber in a padded cylinder so that wind-induced vibrations do not cause the fiber to scrape against metal.