CMS

Hi everyone, this is my first post , after spending 8 hours on line and no success ,being an M&E Manager electrically biased, I check for conformity on twelve domestic construction sites, one in particular has a design and build electrical contractor, my issue is in the electrical intake room in the basement of a new build  5 storey apartments, the tray and trunking is installed to a good standard however all the conduit from a stop end box on the trunking is in white plastic, at least 60 lengths serving both high level lights, sockets and life safety systems, can someone please tell me is their is a BS or regulation which opposes this install, also where do the fire regulations sit with this.