Single-line diagram for an industrial building in Tijuana

The single-line diagram is the drawing that shows, in one view, how the building is fed: service entrance, transformation, switchgear, protection and the main loads. In Tijuana, CFE, the UVIE and corporate engineering typically ask for it when a new service is contracted, load is increased or the installation is verified.

Alianza prepares it from the site survey and nameplate data. The drawing matches what is installed in the field, so the review can compare plans and work without rework. We include it in the CFE power file.

• Single-line of the service entrance, transformation and main switchgear.
• Protection, conductor and process-load data.
• An update when the building already operates and the arrangement has changed.
• Delivery in the format the utility or the verification asks for.

1. Review existing drawings, photos and nameplate data.
2. Survey the electrical room and the substation when needed.
3. Draw the single-line and cross-check it with the calculation notes.
4. Revise the drawing with your comments and issue it for the file.

• A previous single-line, even if it is out of date.
• A list of machines or panels and their nameplate data.
• A building plan and the substation location.

If the work includes the substation, see also CFE substation for a plant.

If you have a previous drawing, a load list or photos of the electrical room, send them on WhatsApp to 664 604 1810 or to [email protected].