Ground Wire Size For Hot Tub

The recommended hot tub wire size is 6 awg copper.

Ground wire size for hot tub. The ground conductor size calculator will calculate the proper ground conductor size for grounding raceways and equipment based on ampere rating or setting of automatic overcurrent protection device in circuit ahead of equipment. Essentials for your installation including the required gfci ground fault protection and circuit wire size. Leave at least 6 inches of extra wire hanging from the spa panel. Wire length is also an important consideration when connecting a hot tub.

National electrical code nec 2014 edition table 250 122. Both 3 wire and 4 wire spas must be gfci protected. From the main panel to the disconnect but would it be better to bump up to 4 for the whole run. This is based on nec nfpa 70.

A shoe box sized. Or is the ground in the main cable that supplies the power to the tub sufficient. The four wires consist of two hots one ground and one neutral and must be hard wired to the terminals inside the hot tub control box. Electrical codes and details for spa and hot tub wiring.

Beginning at the lb fitting use fish tape to pull the wires from the fitting to the spa panel. Many older 240v spas and some newer ones use 3 wire installations. Barry an electrician from vancouver b c canada. The wiring info for my spa hot tub states if the run from the main panel to the disconnect is over 100 feet i should use 4 and then 6 from the disconnect to the hot tub panel.

When hooking up the ground wire of a hot tub is there a separate ground wire required from the main panel. This electrical wiring question came from. A 4 wire hot tub must not be connected to a 3 wire service. Electric panel house wiring circuits and circuit breakers.

During hot tub wiring copper wire is recommended with thhn thermoplastic nylon insulation. In general it is best to keep the distance between the hot tub and the ground fault circuit interrupter breaker as short as possible. The recommended wire size is 6 awg copper although depending on distance and length of run could be larger. This reduces the chance of ground faults that may trip the gfci breaker due to moisture buildup in the conduit.

Proper grounding is also essential. The electrical connection to the hot tub must be single phase 220 240 volt 4 wire. It will only be about 45 50 feet max.