関連ワード:  how to wire a 2 switch box    how to wire a 2 gang switch box    how to wire a 2 gang light switch box    how to wire a 2 gang electrical box    how to wire a 2 way junction box    how to wire a two light switch box    how to connect 2 electrical boxes together    how to connect 2 junction boxes together    how to connect 2 electrical boxes    how to wire 2 switches in one box