Installing a outlet for microwave.? I am installing an outlet in a metal box for a...

I am installing an outlet in a metal box for a microwave using existing 2-wire bx cable. The condo have emt throughout. Is the outlet considered grounded?
Why are man hole covers are circular?
Answers:    The jacket of the BX cable is the ground as it should carry through to the breaker box. That routine you should run a green or bare cable from the ground connection on your outlet to the metal box to pick up your ground. Once wired, check the circuit for a accurate ground.
Our garage floor have a crack across it...