I want to draw an electrical circuit, inverting (mirror) the symbols of the contacts, but when I do, I lose the vertical alignment of the symbols and the lines are no longer horizontal.
\documentclass[border=7pt,10pt]{standalone}
\usepackage[utf8]{inputenc}
\usepackage{tikz}
\usetikzlibrary{circuits.ee.IEC,positioning,chains,calc,fit}
\begin{document}
\begin{tikzpicture}[circuit ee IEC]
\node(Ov) at (0,2em){0V};
\node[make contact={info=$a_i$}] (ai) at (5em,0){};
\node[break contact={info=$b_i$},right=6em of ai,yscale=-1] (Nbi){};
\draw (Ov) |- (ai) -- (Nbi);
\node[break contact={info=$a_i$},below=2em of ai] (Nai){};
\node[make contact={info=$c_i$},right=13em of Nai,yscale=-1] (ci){};
\node[bulb={info=V}, above right=1em and 6em of ci](V){};
\draw (Ov) |- (Nai) -- (ci);
\node[make contact={info=$b_i$},below=5em of Nbi] (bi){};
\node[break contact={info=$c_i$},right=6em of bi,yscale=-1] (Nci){};
\draw (Ov) |- (bi) -- (Nci);
\draw (V) --++(-3em,0) |- (Nbi);
\draw (V) --++(-3em,0) |- (Nci);
\draw (V) --++(-3em,0) |- (ci);
\end{tikzpicture}
\end{document}