circuit.tex

  \begin{circuitikz}[]
  \draw (3,0) node[spdt,xscale=-1,yscale=-1] (SwR) {};
  \draw (1,0) node[spdt] (SwL) {};
  \draw (SwL.out 1) -- (SwR.out 2);
  \draw (SwL.out 2) -- (SwR.out 1);
  \draw (SwL.in)
  -- (0,0) to[sV=220<\volt>] (0,3)
  -- (1,3) to[lamp] (3,3) -| (SwR.in);
  \end{circuitikz}

wiring.tex

\begin{circuitikz}[
    octagon/.style={shape=regular polygon, regular polygon sides=8, draw, minimum width=2cm, thick},
    pvc/.style={double, double distance=0.5cm, thick},
    wire/.style={thick}
  ]
  \node (utility 1) at (4,0) [draw,thick,minimum width=4cm,minimum height=2cm] {};
  \node (utility 2) at (4,-4) [draw,thick,minimum width=4cm,minimum height=2cm] {};
  \node (junction) at (10,0) [octagon] {};

  \draw[pvc] (0, 0) -- (utility 1);
  \draw[pvc] (utility 1) -- (junction);
  \draw[pvc,transform canvas={xshift = 1cm}] (utility 1) -- (utility 2);

  \draw (utility 1) node[spdt, yshift=-0.1cm] (SwL) {};
  \draw (utility 2) node[spdt] (SwR) {};

  \coordinate (traveler) at ([xshift=1.75cm,yshift=-0.5cm]SwR.in);

  \draw[wire] (0, -0.1) -- (SwL.in);
  \draw[wire] (SwL.out 1) -- ++(0.25,0) |- (SwR.out 1);
  \draw[wire] (SwL.out 2) -- ++(0.4,0) |- (SwR.out 2);
  \draw[wire]
    (SwR.in) |- (traveler) |- (junction.west|-SwL.in) to[connect with angle=-45]
    ([yshift=-0.6cm]junction.center) to[lamp] ++(0,1.2)
    to[connect with angle=45] ([yshift=0.2cm]junction.west|-SwL.in) -- ([yshift=0.2cm]traveler|-SwL.in) |- ++(-2.5,0.5) |- (0,0.1);
\end{circuitikz}