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Appliances Can Kill… Safety First!

NAC-Trainer June 5, 2020

!!! NEVER WORK ON A LIVE APPLIANCE !!! Always make sure that you unplug the appliance that you are about to work on before commencing work. Where an appliance has a High Voltage Capacitor fitted, such as a Microwave or a Combination Oven, ensure to safely discharge the capacitor before working on the appliance.

Make sure to carry out your Safety Tests – Insulation Resistance, Earth Continuity and Earth Loop Impedance Testing should be completed before carrying out any work. Links to each course are below:

Insulation Resistance and Earth Continuity Testing
Earth Loop Impedance Testing

Plug Isolation – When you have disconnected an appliance by removing the plug, make sure to isolate that plug so it cannot be plugged back in by mistake by either yourself or someone else on site.

Hard Wired Appliance Isolation – If you need to work on a hard-wired appliance and you cannot Isolate the power at the wall supply, make sure to use a Lock-Off Device at the MCB or RCD so no-one can re-apply power while you are working on the appliance.

Socket and See Lock Off Device

High Voltage Capacitors – These appliances contain high voltage capacitors which can store voltages of up to 2500V. The reality of this is if not discharged and contact is made a real chance of death is possible. Anytime the casing is removed from the appliance the capacitor must be discharged.

To discharge the HV capacitor short out the terminals using insulated VDE pliers rated up to 1000V. As an extra precaution, you can also short each terminal of the capacitor to the casing.

error: This content is Copyright - NAC (Domestic Appliances) Ltd - 2020