New code applies to new construction, or new circuits installed TODAY, not new
appliances. Hook up your new stove exactly the way the old one was connected
and don't worry about "what the guy at Lowe's told me."

People who work at home centers are either has-beens or wanna-bes and love
baffling homeowners with what little knowledge they do have, even if it's
inaccurate or inapplicable.