Emergency-Temperature Testing on MV Jacketed Reduced-Wall TRXLPE Aluminum Cable Systems in Duct Bank
Bibliographic record
Abstract
Two MV reduced-wall TRXLPE-insulated 500-kcmil aluminum-conductor cables with encapsulated XLPE jacket were designed as replacements for the 350-kcmil copper-conductor cables with bare concentric neutral. The objective was to realize substantial cost savings on the purchase of the expensive copper-conductor cables. However, it would require an appropriate reduction of the insulation thickness of the aluminum cables in order to have the same ampacity as well as to fit into the existing 90-mm (3½") PVC conduit. An emergency temperature test to be carried out in a duct bank containing 90° bends was chosen to evaluate the overall performance of the new cable systems. Thermal, mechanical, and electrical measurements were made in the testing. The test results were compared to those obtained previously on the 350-kcmil copper-conductor cables.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".