Here's why:

* Structure: PCP has a large, nonpolar hydrocarbon ring system. This ring structure is comprised mainly of carbon and hydrogen atoms, which have similar electronegativities and therefore form nonpolar bonds.

* Polar Groups: While PCP does contain a nitrogen atom, it is involved in a tertiary amine group, which is only weakly polar. This weak polar group is overshadowed by the large nonpolar hydrocarbon structure.

* Solubility: PCP's nonpolar nature is evident in its solubility properties. It is much more soluble in nonpolar solvents like ether and chloroform than in polar solvents like water.

In summary: The dominant feature of PCP's molecular structure is the large, nonpolar hydrocarbon ring system, making it a nonpolar molecule overall.