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Low Voltage Services


The Client:

Mossdale is a K-8 School and part of Manteca Unified School District in Lathrop, California. They hired us to design a system that was versatile for future data speeds and supported CATV.



The Site:

The site was already under construction when we were brought on to the project. They had plans to build four classrooms, a gym, an admin building, and a science building. Three of the classrooms were already constructed. Therefore, we were forced to treat them as if they were a retrofit. The other buildings were still being built so we were able specify pathways that would work best for us.

Original Plan:

The original plan that the electrical engineer came up with was to use a TV faceplate at 84” AFF, a phone jack at 48” AFF, and a Cat5e data at 18" AFF. This would allow them to hang a TV in the corner of the room, have a phone on the wall for the teacher near the whiteboard, and have 1 gig data capabilities for computers at the floor.

Updated Plan:

The new plan, resembles the old one but there are a few changes. The cable for the TV was moved to the data outlet. Since the outlet was already in place we installed a Cat5E cable to allow flexibility of use. With the Cat5E, they can use it for a wireless access point, a television, or other future technology. The phone stayed the same in our design. The data faceplate, however, was changed to incorporate the Cable TV (CATV) and potential 40gig data for the future.


Since three of the buildings had already been finished, ¾” conduit was already in place. This did not allow us to put the larger diameter data cables and a coax cable for TV.



The solution we chose was to run Augmented Cat6A and Class F from Siemon Cabling Systems to the data outlet as well as install a lynx broad band hub in the closet and use an external balun at the station. This allowed flexibility of use at this teaching station and future proofed the data for three life cycles of electronics.


Our new design left the infrastructure very versatile and created three phases for the school to expand. The first lifecycle uses Cat6a for CATV and split a Class F connection to run 1gig Data and a Printer. The second lifecycle will move data over to the Cat6a to allow 10gig data and CATV will be put with the printer onto the Class F connection. The third lifecycle will put a potential 40gig data connection on the Class F cable. CATV will be moved back to the Cat6a with the printer through a Lynx Balun. We had planned on using lifecycle two from the beginning, but we had an issue with the class F patch cord and the balun.

Click here for an article addressing this issue from a technological point of view.

Design in Use:

With our design, the teacher is able to take the CATV feed directly into a balun and control/watch TV from their laptop.

The teacher can then record CATV programming onto their laptop for later playback.

The recorded video or live video can then be projected onto the screen for the class to watch. This is a large screen that is easy to see, and is used in conjunction with overhead speakers to provide the students with optimal listening capabilities.