Hot Tub Wiring Installation | Jacuzzi | Spa | Electrical Jacuzzi and Spa Electrical Wiring Costs. The electrical cost associated with your spa or jacuzzi installation will be greatly impacted by the distance that your spa or jacuzzi is located from your main electrical panel. An electrical installation that is reasonable close to the main panel would require less wire, conduit and labor than an How to Wire a Spa - Wiring for 120V and 240V hot tubs CAUTION: Electrical work and repairs can be dangerous, especially around water. There is a risk of shock or electrocution, which could result in serious injury or death. We strongly advise that hot tub electrical wiring be referred to a licensed electrician.