A housing assembly is adapted for housing fully pre-wired printed circuit boards populated with diverse electrical components. The housing assembly includes multiple nipples and an optimized geometry for mounting to or mounting within commonly available conduit-related fixtures in a variety of installation configurations. These installation configurations allow for simpler wire routing where voltage separation is required, for greater accessibility to gang junction box cover plates on gang junction boxes to which the housing assembly is mounted, and for more installation options for wide range of common gang junction boxes as compared to existing housings.