Four-storey apartment panel replacement single line diagram

Floor panels replaced on existing three-phase risers. Use this for replacing the floor panels in a four-storey apartment building while keeping the existing three-phase risers.

A free template with typical ratings, conductor callouts and general notes. Open it, change what differs on your job, fill in the title block and export a PDF.

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What the reviewer checks on this drawing

The reviewer looks for which riser conductors are re-used and how they were tested, the order of the work to limit outages, and firestopping of the riser penetrations.

What the drawing shows

Every device on the sheet, in the order power reaches it.

Notes on the sheet

• Existing riser conductors re-used where tested and found serviceable; otherwise replaced as shown.
• Floor panels replaced one at a time to limit outages. Notify tenants in advance.
• Firestop all riser penetrations to match the floor assembly rating.

Diagram is schematic and not to scale. Field-verify existing equipment ratings. Ratings and conductor sizes shown are typical. Confirm against the adopted code, the equipment listing and a load calculation before installation. Code references are to the 2023 NEC and the 2024 Canadian Electrical Code: see references and editions.

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