You might want to consider a 50 amp circuit rather than 40 A. 40 A will only let you charge at 32 A which might be adequate for your current car but in the future you might need more. The 50 amp circuit will let you charge at 40 A which is required for several different types of cars. I had a 60 amp circuit installed when my house was built. This allows me to use the Tesla wall charger at its maximum rate of 48 A. My current Tesla only needs 32 A but I’m looking forward to the future. Changing from 40 A to 60 A only cost a few extra dollars but will save you a lot in case you have to upgrade in the future.
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