Health and Safety H&S at Work What is a hazard? What is a risk? Hazard to risk 1 Hazard to risk 2 Hazard to risk 3 Dealing with risks COSHH Electrical dangers Fuses Calculate fuse rating Initial surge Rule of thumb Wiring a plug Surges and spikes Pat testing PAT labels Overdue PAT tests Fire drill Classes of fire Fire Extinguishers Moving and handling Ergonomics Maximum comfort Workstation setup DSE 1992 DSE and employers Desks and chairs Noise Information
Technicians’ Site

Copyright © Anne Watson

Home. e-learning. Multiple Choice. Handouts and Links. Contact Anne. About this site.

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)

To calculate the fuse rating for a 1KW (1000 watts) appliance, divide the wattage (1000) by the voltage (230).

I (Amps) = P (Watts) 1000 ÷ V (Voltage) 230

I (Amps) = 4.35

A five amp fuse would be required.