Okay, that's a recipe for a dangerous and non-compliant hot tub installation. Let's break down all the issues: Undersized Feeder (6-2 Cable)

This is a major problem. Hot tubs, especially those operating at 240V, typically require a significant amount of current. A #6-2 cable might be insufficient for the amperage draw of the heater and other components. This can lead to overheating of the cable, voltage drop, and potential fire hazard. The correct wire size is determined by the hot tub's nameplate amperage rating, with appropriate consideration for conductor ampacity based on the installation method and temperature rating.

Improper Grounding (Tapped White Wire)

Using the white wire (typically the neutral conductor) as a ground is a dangerous and illegal practice. The neutral carries current back to the source, while the ground is intended as a safety path for fault current. Connecting them creates a path for stray neutral current to flow through the grounding system, potentially energizing grounded metal parts and creating a shock hazard. White wires should be properly re-identified if they're used as a hot conductor, but only in specific circumstances and never for grounding.

Ground Rod as a Substitute for Proper Equipment Grounding: Adding a ground rod at the hot tub is not a substitute for a proper equipment grounding conductor run back to the main electrical panel. The ground rod's primary function is to provide a path to earth for lightning strikes and to help stabilize the system voltage. It is not* intended to handle fault current from a hot tub. The equipment grounding conductor (typically a green or bare wire) provides a low-impedance path back to the source, allowing the circuit breaker to trip quickly in the event of a fault.In short, the installation violates fundamental electrical safety principles and puts users at risk of electric shock, fire, and equipment damage. This install has multiple code violations and a real potential for serious harm. A licensed electrician needs to evaluate this installation and correct all the deficiencies. Flag for review