\documentclass[12pt,border=1pt,crop,multi=false,tikz,class=scrartcl]{standalone}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{lmodern}
\usepackage[american]{circuitikz}
\usetikzlibrary{calc,positioning,arrows}
 
\renewcommand*{\familydefault}{\sfdefault}
 
\begin{document}
\begin{tikzpicture}[>=implies]
\node at (0,0) (c1) {
    \begin{circuitikz}[american]
     \draw [semithick,scale=1.2]
            (0,0) node [above] {A} 
            to [generic,l_=Z\textsubscript{AT},*-] ++(2,0)
            node [above] {T}
            to [generic,l_=Z\textsubscript{BT},*-*] ++(2,0)
            node [above] {B}
            (2,0) to [generic,l^=Z\textsubscript{CT},-*] ++(0,-2)
            node [below] {C}
            (0,-2) to [short] ++(4,0)
       	;
    \end{circuitikz}
};
\node at (7,0) (c2) {
    \begin{circuitikz}[american]
     \draw [semithick,scale=1.2]
            (-1,0) -- (0,0) node [above] {A} 
            to [generic,l_=Z\textsubscript{AC},*-] ++(0,-2)
            (0,0) to [generic,l_=Z\textsubscript{AB},-*] ++(2,0)
            node [above] {B}
            to [generic,l^=Z\textsubscript{BC},*-] ++(0,-2)
            (2,0) -- ++(1,0)
            (-1,-2) to [short,-*] ++(2,0)
            node [below] {C}
            -- ++(2,0)
       	;
    \end{circuitikz}
};
\draw [<->,double distance=4pt,thick] (c1) to (c2);
\end{tikzpicture}
\end{document}