In a 4 wire 240V electric cable I have the color code Red-Black-Blue-Orange. Which is the Neutral and which is the ground wires here.

Country?

Red and Black are usually hot, In Europe blue may be neutral, and ground is usually green or green with yellow. This doesn't Sound? Like a power cable.
Can you read manufacturers Name and Cable type on cable?

In a 4 wire 240V electric cable I have the color code Red-Black-Blue-Orange. Which is the Neutral and which is the ground wires here.

You could always ring them out. Grounding wire will ring to the metal case( org) the

Load will have a resistance between two conductors (blk/red) the neutral will have a

Different resistance between itself and two conductors(blue)