( ( ( Rough-in -- ) ( ( ( ( ( ( Framing , ) plumbing ) , ) ( electrical wiring ) ) , ) insulation ) ) . )
(ROOT (NP (NP (NNP Rough-in)) (: --) (NP (NP (NNP Framing)) (, ,) (NP (NN plumbing)) (, ,) (NP (JJ electrical) (NN wiring)) (, ,) (NP (NN insulation))) (. .)))
Rough-in -- Framing, plumbing, electrical wiring, insulation.
(ROOT (S (NP (JJ Electrical) (NNS wires)) (VP (VBP are) (ADVP (RB usually)) (VP (VBN covered) (PP (IN with) (NP (NN plastic) (CC or) (NN rubber))) (S (VP (TO to) (VP (VB insulate) (NP (DT the) (JJ electrical) (NN wire))))))) (. .)))
Electrical wires are usually covered with plastic or rubber to insulate the electrical wire.