Unit of measurement of electrical current. Is the current need to blow (break) the fuse. When a fuse has blown it removes electrical power from an electrical circuit. The fuse rating is usually on the side of the fuse. The fuse rating is usually defined in ‘amps’.
Calculate Fuse Ratings. There is a formula for working out the fuse rating, voltage or wattage for each appliance. P (Power in Watts) = V (voltage) x I (current in Amps). The fuse rating can be calculated by dividing the power used by the appliance by the voltage going into the appliance. I (Amps) = P (Watts) ÷ V (Voltage). A fuse rating is the current need to blow (break) the fuse. When a fuse has blown it removes electrical power from an electrical circuit. The fuse rating is usually on the side of the fuse. The fuse rating is usually defined in ‘amps’ – amps are the unit of measurement of electrical current. Miles are a unit of measurement of distance, Celsius are a unit of measurement of temperature, Fuses have two basic ratings. The first is current rating. The current rating is the amount of current that a fuse will safely pass before blowing. When the current flow through a fuse exceeds its rating, it opens up and breaks the circuit. If a fuse has a 5 A rating, it will open as current flow through it exceeds 5 amps. It is useful to note that there are some fuses that are designated as time delay. These fuses will sustain current in excess to their current rating for a short period
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what is a fuse rating