Well
I do the Rs in the CU myself I only use the plug check my results around the circuit.
It is also a quick way of finding a fault in a ring that has come on testing :D :D :D
I Just use a normal plug with three holes just big enough for my probes to go through above each pin.
Suppose I am gonna get slammed by all the safety concious amongst you.
Firstly is the cooker the same power as your old one. then is the cable ok for this amount of power. Are you 100% confident that the circuit is OK.
Forgive me if I sound blunt but only the other day I was called to a faulty shower. The punter told me the old one had broke so he fitted a new...