Leon , we use 15/20 amp single phase leads and plugs at work for our inverter TIG welding machines that can pump out up to 200 amps , the smaller 80-140 amp machines are 10 amp .
For over 200 amps we use 3 phase at 400 volts.
15/20 amp single phase leads are heavier duty and the earth on the male plug is wider and thicker to fit the 15/20 amp female wall socket / FM plug but the phase and neutral are the same size as standard 10 amp plugs .
You can put a 10 amp male end into a 15/20 but you cant fit a 15/20 into a 10 amp wall/FM plug .
Just be sure the earth on the new stove plug is larger than say the one on the jug or TV and the wall socket has a bigger earth slot for the heavier earth of the plug , its quite a lot bigger ( wider and thicker ) and easy to see without measuring .
Also check the circuit breaker that should be only for the 'Stove' as Aussie Trooper says .
Brian