For most full-sized spas or hot tubs, the National Electrical Code (NEC) requires: Hard-wiring the spa into a ground fault circuit interrupter (GFCI)-protected 220 to 240V, 50- or 60-amp dedicated circuit.

What size wire do I need for 50 amp hot tub?

ALL 240V SPAS WILL REQUIRE A 40, 50, OR 60 AMP 2-POLE GFCI PROTECTED BREAKER .Wire Size Table.Amperage of SpaGauge of Wire40-50 ampAWG #860 ampAWG #6

How many amps does a hot tub actually use?

A large portion of 240V spas manufactured today require a 50 amp 4-wire electrical service. Some hot tubs have load requirements of 30A or 40A, and a few even 60A. These requirements correspond to the size of the new feed circuit breaker installed in the house service panel.