Secondary Unit Substations

Read revision 5

Revision 5 · Oct 19, 2026 +1 −1

Remake batch 25 and its neighbor re-points, batch 24 where missing, and the adopted-electrical-code parameter: brought in line with the authoring repository
Showing changes from Rev 4 to Rev 5 in Secondary Unit Substations.
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title: Secondary Unit Substations
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# Identification {toc}
−## Nameplates shall be furnished on the assembly, on each section, and on each main, tie, and feeder device, and shall comply with [[sync/electrical-identification]] for material, lettering, and attachment.
+## Nameplates shall be furnished on the assembly, on each section, and on each main, tie, and feeder device, and shall comply with [[sync/equipment-labeling]] for material, lettering, and attachment.
## The assembly nameplate shall state the assembly designation, the primary and secondary system voltages, the transformer kVA rating at each cooling stage and its impedance, the primary section and secondary section short-circuit ratings, the secondary main bus rating, the source that feeds each primary section, and the manufacturer of record.
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## Spare parts shall be of the same manufacturer and rating as the installed items, shall be delivered in their original packaging, and shall be labeled with the designation of the section and device they serve.

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