Replacing old plug-in 220V range with new hardwire 3-wire electric cooktop: remove outlet or add a plug?

My apartment had an electric range which plugged into NEMA 10-30P/10-50P and was served by two 50A circuits. I will be installing electric/220V induction cooktop using the same circuits.

There are three wires in the plug (red, black and white).

There are three wires in the new cooktop (red, black and green).

Instructions say to connect the green wire from the cooktop to the white wire from the wall. So far so good, except the outlet will need to be removed and some sort of extension box will need to be put in its place to allow the connection in the back of the cabinet.

Is it possible instead to put a plug at the end of the cooktop 3-wire cable? If yes, then is there an advantage to doing that rather than hardwiring it?

Electrical requirements for new cooktop: 3-wire or 4-wire single phase 208 or 240 volt AC, 60-Hz, on dedicated double pole circuit breaker of at least 40 amps.

For the old range: "You must use a single-phase, 120/208 VAC or 120/240 VAC, 60 hertz electrical system. ... connected to an individual, properly grounded, 40 amp (minimum) branch circuit"

I'm in NYC if that matters.
#Kitchens #Electrical #240v
Kitchens Electrical 240v