I think Sam2 has the right idea. Based on the AH’s understanding of electricity, it is nothing more than extending Aish; the electrical current. The Chazon Ish,(a great and hidden scientist in his own right) vehemently disagreed, and rightly forbade flipping a light switch because of the Issur of Boneh, since you are creating a new circuit.
I have never heard that Rav Ovadia said Ein Limchos with regard to this. If the AH would have fully understood electricity, there is no question he would have agreed.