Final answer:
The white wire of a 4-way flat connector usually represents the neutral wire and should be connected to the neutral terminal of a three-hole outlet or corresponding device, which is often indicated by a white color mark or a silver-colored screw.
Step-by-step explanation:
The question concerns the correct way to connect the white wire of a 4-way flat connector. When wiring a three-hole outlet or any other device, it is critical to match the wire colors to their appropriate connections. According to standard color codes, the white wire is typically used as the neutral wire. This color coding helps to ensure that the electrical system functions properly and safely. It's important to check the color code that applies to your region, but generally, the neutral wire is white, and it should be connected to the neutral terminal, often marked by the same color or a silver-colored screw on the outlet or connector.