Wire Size For Hot Tub

Wiring a hot tub electrical question.

Wire size for hot tub. Beginning at the lb fitting use fish tape to pull the wires from the fitting to the spa panel. During hot tub wiring copper wire is recommended with thhn thermoplastic nylon insulation. Installing a panel for a hot tub. They come in different sizes or gauges materials and colors that refer to their intended function.

For safety reasons a gfci is designed to automatically shut off power to the hot tub when a current leak or fault is detected. The recommended wire size is 6 awg copper. A bare copper wire is attached to bonding lugs on metal and electrical spa equipment. 1 red 1 black hot 1 white neutral and 1 green ground wire in our example.

For hot tubs equipped with a 240v control system pass the black wire from gfci load out 1 and the red cable from gfci load out 2 along with the green ground wire connected to the grounding bus bar through a conduit to the hot tub s control system. Hot tub circuit wiring. Power hook up to the hot tub must be single phase 240 volt 4 wire two hot one neutral one ground. Installing a panel for a hot tub.

Choosing the correct wire for a hot tub ensure a safe energy efficient usage and increase the lifespan of your equipment. The recommended hot tub wire size is 6 awg copper. I connected my hot tub with 240 volt 50 amp gfci at the spa terminals i checked between the red and black wires and have 240 volts but i cannot get 240 volts at the pumps which will not turn on. Thicker wire will be able to handle lighter current volumes but a thin wire will short circuit and damage the equipment if high volume current is passed through it.

Leave at least 6 inches of extra wire hanging from the spa panel. When in doubt consult a licensed electrician with experience hooking up hot tubs. How can i wire a hot tub from the power source to the gfci and the factory wired control box. Bonding for hot tubs is an important part of electrical safety.

How to connect hot tub gfci circuit wiring understanding a 120 240volt 4wire hot tub circuit. Wire size type for hot tubs after reviewing the spa owner s manual our electrician determined that our project needed 6 thhn stranded copper wire. Bonding captures stray voltages or short circuits that any one load pump blower heater may be producing. The wire size chart below shows allowable ampacities of insulated conductors rated up to and including 2000 volts 60 c through 90 c 140 f through 194 f not more than three current carrying conductors in raceway cable or earth directly buried based on ambient air temperature of 30 c 86 f.

Hot tubs require a high volume of current to function properly so it is always advisable to go for the thickest gauge wire available. I want to add a panel for a hot tub some outlets and lights. He used four individual insulated conductors.