VISUAL DEVICE NOT LESS THAN 90" TO TOP OR 6" BELOW CEILING, WHICH EVER IS HIGHER. 54" TO DIAL CENTER (NON-ACCESSIBLE). Additional discipline specific guidance related to electrical work can be found throughout the Design & Construction Handbook (DCH) including, but not limited to sustainability, plumbing, fire life safety, telecom/IT, and commissioning guideline sections. It is imperative that the designer. ction is to provide guidance for all electrical work at LAWA. See also--This advisory circular contains the specifications for airport light bases, transformer housings, junction boxes, accessories, and elevated light fixture covers and stakes. This AC is not intended to be a compilation of.