Can Neutral Be Used as Ground?

a ground and a neutral are both wires. unless they're tied together with other circuits, and not a 'home run' back to the panel, there is no difference between the two where they both end up on the same bus bar in the box.

Can a neutral wire be used as a ground?

Neutral wire carries the circuit back to the original power source. More specifically, neutral wire brings the circuit to a ground or busbar usually connected at the electrical panel. This gives currents circulation through your electrical system, which allows electricity to be fully utilized.

What happens if neutral wire is grounded?

In Short if neutral wire touches a earth wire,

An earth wire carrying load current is a risk of electric shock because a person touching this earth may present an alternative path for the load current and thus the risk of electric shock.