Hot Tub Electrical Installation Hookup GFCI Hooking up a 230 volt hot tub involves an electrician integrating the main house panel with a 50 or 60 amp breaker, the external GFCI/disconnect box and the spa pak/hot tub controller box. Be sure that the GFCI should corresponds to the house breaker, so for instance a 60A GFCI should be paired with a How to Wire a Spa - Wiring for 120V and 240V hot tubs Hot Tub Wiring Diagrams Use a GFCI disconnect designed for 240V hot tubs, 4 or 3 wire spa types. The interactive schematic diagram below shows 3 and 4 wire configurations. Select the wiring configuration that your spa requires: Spa control box terminals generally cannot accommodate wire larger than #6. Hot Tub GFCI Breakers The Basics How To The Spa Guy Click to view on Bing6:08This video is about The Spa Guy teaching you the basics of GFCI Hot Tub Wiring and the ins and outs of wiring a Hot Tub.. for parts click the banner above or go to wwwubPartsofAmerica #Author: Spa GuyViews: 349K Square D Hot Tub Gfci Breaker Wiring Diagram | Free Wiring Collection of square d hot tub gfci breaker wiring diagram. A wiring diagram is a simplified traditional photographic depiction of an electrical circuit. It shows the components of the circuit as simplified forms, and the power and also signal connections in between the tools.