64 Wire For Hot Tub. You will save a little on labor because the house has open framing however the bulk of the money is spent in materials. Leave at least 6 inches of extra wire hanging from the spa panel.
How to Choose the Right Wire Gauge for Your Hot Tub. During hot tub wiring copper wire is recommended with THHN thermoplastic nylon insulation. 68012 and 68042 A disconnect must be installed within sight of Hot Tub.
Hot Tubs and Spas - NEC Electrical Codes.
The recommended hot tub wire size is 6 AWG copper. For a 240-volt hot tub a 10-gauge wire with a 30-amp breaker setup is ideal. 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 tubs control system. The recommended hot tub wire size is 6 AWG copper.