All systems require a 4 wire 240v line to be installed. We also highly recommend using a GFCI breaker for added protection. All installations should be performed by a professional electrician. The 10-30gal Spike System requires (1) NEMA 14-30 to run the entire system. The 50gal requires (1) NEMA 14-50 outlet to run the entire system. When shopping around be sure to confirm how many outlets are needed. Other systems require upwards of (4) 240v outlets, each of which can cost upwards of $750ea to install. 

The attached panel sheet discusses the electrical requirements further in detail.