Fume Hood & Overhead Service Carrier Wiring
Apr 28, 2021
11
| Project Phase: Construction Delivery Method: EPC (Engineer Procure Construct) Statement of Problem: The project has numerous fume hoods and overhead service carriers located throughout the labs, that were pre-wired and pre-plumbed at the factory. These were designed and specified by the lab planner architect within a bid package to a lab equipment supplier. Both the fume hoods and the overhead carriers are pre-plumbed with specialty gases as well as electrical circuiting to support existing lab analytical machines that the Owner was relocating into the space. The design of the gases and power was part of a separate bid package for all MEP, which was not yet finalized when the carriers and hoods were released for construction. As the fume hoods and the carriers were being installed, the electrical configuration was questioned by the electrician since the pre-wired circuiting of the hoods and carriers did not match the required circuiting of the electrical plan. Further, the way in which the receptacles were graphically shown for the hoods did not clearly define how the receptacles should be installed: based on the print, some of the receptacles which were meant to be installed in the fume hood pillars were instead installed on the walls, and had to be reworked. For the carriers, the proper circuits were pulled to the carrier, but each carrier only had one pre-wired circuit for all of the receptacles in it, instead of dedicated circuits required for each of the Owner''s lab equipment. This same type issue was discovered with the fume hoods. |
