Handyman wired a customer's hot tub: 6-3 NM-B from a 50A GFCI breaker, ran it out through the wall into 3/4 PVC conduit down into the ground and over to the spa pack, with a non-fused disconnect right next to the tub.

This installation has several code violations:

1. NM-B cable in wet locations (NEC 334.12(B)(2)) - NM-B is prohibited in underground conduits and outdoor wet locations. The cable must be replaced with individual THWN conductors or UF cable rated for wet locations.

2. Underground conductor requirements (NEC 300.5) - Direct burial cables need 6" minimum burial depth; PVC conduit requires 18" depth. The installation likely doesn't meet these depth requirements.

3. GFCI protection (NEC 680.22, 680.43) - Hot tubs require GFCI protection, but the 50A GFCI breaker may not be properly coordinated with the spa pack's requirements.

4. Disconnect requirements (NEC 680.12, 680.43) - The non-fused disconnect must be within sight of the tub (max 50 feet) and have a locking mechanism. It also needs to be rated for the application.

5. Conduit fill and wiring method (NEC 300.3, Chapter 9) - Multiple cables in conduit create heat dissipation issues and may exceed fill capacity.

Safety concerns: This setup poses electrocution and fire risks. The NM-B cable will degrade in the wet conduit environment.

Recommendation: This requires immediate correction by a licensed electrician. Replace NM-B with proper wet-rated conductors, ensure proper burial depths, verify disconnect specifications, and confirm GFCI coordination. Do not energize until corrected.

Multiple code violations. This is unsafe and illegal.

1. NM-B in Wet Locations (NEC 334.12(B)(4)): NM-B (Romex) is not permitted in wet or damp locations. Exterior conduit is defined as a wet location (NEC 300.5(B)). The cable jacket will degrade; water ingress causes ground faults and fire.
2. Conduit Fill/Physical Damage: 6-3 NM-B (approx. 0.75" OD) in 3/4" PVC exceeds the 53% fill limit for 2+ conductors (Chapter 9, Table 1, Note 4). It’s also nearly impossible to pull without damaging the jacket.
3. Missing Conduit Body/LB: You cannot run NM-B into a box/conduit without a listed connector (300.15, 314.17). The cable sheath must be protected from abrasion at the entry point.
4. No Equipment Grounding Conductor (EGC) Continuity: NM-B has a bare EGC. In PVC conduit, you cannot rely on the conduit for grounding. The bare wire must land on the spa pack ground lug and disconnect ground bar. If the handyman stripped the sheath outside the box, the EGC is exposed to damage/sunlight.
5. Disconnect Location (NEC 680.12): Must be readily accessible, within sight of the tub, and ≥5 ft horizontally from the inside wall of the tub (unless separated by a barrier). "Right next to the tub" likely violates the 5-ft rule.

Required Fix: Replace the NM-B entirely. Pull individual THWN-2 conductors (2 hots, 1 neutral, 1 ground — #6 AWG Cu) in the existing 3/4" PVC (verify fill: 4x #6 THWN-2 ≈ 35% fill, OK). Use a listed LB/conduit body at the house with a proper NM-to-THWN transition inside a junction box, or run THWN-2 all the way to the breaker. Ensure disconnect meets 680.12 spacing.

This requires a licensed electrician. The handyman created a shock/fire hazard.