Consider an RC quadripole with open-circuit impedances <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">z_{11}(s)</tex> , <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">z_{12}(s)</tex> , and <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">z_{22}(s)</tex> , and let <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">s_v</tex> be a pole of any of these functions. If <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">k_{11}(v), k_{12}(v)</tex> , and <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">k_{22}(v)</tex> are the respective residues of these three functions at <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">s_v</tex> , then it is well-known that <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">k_{11}(v)k_{22}(v) - [k_{12}(v)]^2 \geq 0</tex> . If the inequality is an equality, then <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">s_v</tex> is called a compact pole; if every such pole is compact, the network is called compact. In this paper two new properties of compactness are exhibited and discussed. It is shown that if the network is grounded, noncompactness implies certain degeneracies in the determinant of the nodal admittance matrix and its cofactors. If the network is terminated with a resistance <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">R</tex> , it is shown that for all but a finite number of values of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">R</tex> , the overall terminated network is compact. Thus, a noncompact resistance terminated RC quadripole can be approximated to any degree of accuracy by a compact network of this type, which implies that noncompactness is not detectable by terminal measurements of the open-circuit impedances.