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watts Divided by Volts = amps

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Q: What is the correct formula to calculate a fuse rating?
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What is the correct formula for fuse rating?

Watts divided by volts = amps


What is meant by ratting of fuse?

A fuse is given a various rating (strength). For instance, a home appliance (washing machine, etc) would usually have a fuse with a 13 amp rating. While a low powered lamp would only merit a 2 or 5 amp fuse rating. It is important to use a fuse of the correct rating in amps for each electrical appliance.


A transformer is rated at 12V-0-12V and 250mA so what does the 250mA mean and how do you calculate the fuse for the primary winding without knowing the VA rating?

A: The VA rating is there 6v/a the power fuse to blow is 6watts. 050a fuse


How do you calculate the fuse rating level if the full load is 4 amp?

A fuse rating is normally the 120% of the rated full load current. So, 4 amps times 120% is (4x120%) = 4.8amps


What is the correct fuse rating to provide short-circit protection for a 100HP 200V 3-0 wound-rotor motor?

what is the correct fuse rating to provide short-circit protection for a100 HP 200V 3-0 wound-rotor motor


What happens if you use a fuse that's overrated for voltage but has the correct current rating?

Using a fuse correctly rated for current but "overrated" for voltage does not present a problem. Current ratings are critical safety issues, and fuses should be replaced with those of the same current rating. But using a fuse with an identical current rating but a higher voltage rating is not a problem. The reason for that lies in what the voltage rating of a fuse is. Fuses are given a voltage rating to state a maximum voltage in a circuit that they are designed to protect. And the voltage rating has nothing to do with the "normal" operation of the fuse. The fuse carries current when it operates normally, but when something happens and excessive current flows, the fusible link heats up and opens. This is where the voltage rating comes into play. It is possible that a fuse can arc through when it fails. It is the voltage rating that stands in the way of this. As long as the voltage rating of a circuit is not beyond the voltage rating of the fuse, that fuse will fail safely when it fails. It is acceptable to use a fuse of an equal current rating but a higher voltage rating when replacing a fuse that has failed.


It is ok to use a fuse with a higher amperage rating and not ok to use a fuse with a smaller amperage rating why?

It is ok to use a fuse with a higher amperage rating and not ok to use a fuse with a smaller amperage rating why?


How do you know the correct wattage of fuses?

Fuses are rated in amps not watts. You just replace the fuse with one of the exact same amp rating as the one that blew. The fuse is protecting the wiring which you normally cannot change. For that reason you must use the correct rated fuse.


What is the fuse rating of 600watt appliance on a 220 volt supply?

The fuse rating should be 5 amps


What is the current rating of T2L 250v fuse?

The current rating is 2A (2 amps).


How is the minimum fusing current related to the current rating of a fuse?

Each fuse has its own rating. It will be marked on the fuse somewhere.


What is the maximum current that can flow through a fuse?

A current rating of a fuse is designed to open a circuit at a specific current flow. This rating is imprinted on the fuse and lets you know what the maximum amount of current the fuse is designed to open at. A fuse is in the circuit to protect the conductor that the current flows through. Never over fuse a conductor's current carrying capacity.