All power conductors shall be copper. Aluminum conductors are not permitted at any size or in any location, including feeders and service entrance conductors. Minimum conductor size for branch circuits shall be 12 AWG. Conductors for branch circuits longer than 100 feet from panel to first outlet shall be increased one trade size for voltage drop.
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Specification
26 05 19
Low-Voltage Electrical Power Conductors and Cables
spec_260519_r2.pdf · 16 pages · issued Jul 22, 2025 by Ferro Electrical Design · Electrical · revision 2
Indexed passages
page 526 05 19 - 2.01Conductor material
page 1126 05 19 - 3.04Feeder identification and torque
Identify each feeder conductor at every accessible point with a permanent marker showing circuit designation and panel of origin. Terminate all conductors 6 AWG and larger with a calibrated torque tool at the value marked on the terminal or lug, and record the applied value on the feeder termination log submitted at closeout. Terminations without a recorded torque value will be re-terminated at the Contractor's expense.
Cross references
| Direction | Relation | Document | Note |
|---|---|---|---|
| → this | references | RFI-033 Aluminum feeder conductors proposed as a substitution | RFI-033 cites 26 05 19 paragraph 2.01 |