How to Install 220 Volt Electrical Circuit Breakers | Hunker May 09, 2018High demand circuits require 220-volt power. The breakers consist of a pair of interconnected breakers stacked together. Connect one hot circuit wire to one of the breakers and the other hot wire to the other breaker, then connect the neutral wire Author: Chris Deziel How to Wire a 220-Volt Breaker | eHow How to Wire a 220-Volt Breaker. A 220-volt breaker differs from a 120-volt breaker in several ways. The most obvious difference is the size. The 220-volt breaker is twice as thick as a 120-volt breaker. This is because it is basically two 120-volt breakers bonded into one unit. Instead of having one wire attached to the breaker, the 220-volt..