OCP Mt. Diablo 1.0.0 specifies differential 800 VDC: +400 V and −400 V around a midpoint bonded to PE through high resistance or solidly.
±400 VDCobserved
| Value kind | observed — Reported measurements, counts, and specifications keep the precision and scope stated by their source; an exact specification is not treated as a range. |
|---|---|
| Scope | Nominal ±400 V about the midpoint, 800 V full span. High-resistance and solid midpoint grounding have different fault responses, and both need a ground-fault detector (§8.1.4.2.3). Component sourcing does not qualify the installation. |
| As of | 2026-10-08 |
| Source | OCP, Mt. Diablo Disaggregated Power Rack Specification 1.0.0 (Microsoft, Meta, Google), base specification effective October 8, 2026 · §7.3.1 Table 4 (+400 and −400 VDC to COM; 800 VDC to 0/RTN); §8.1.4.1 (midpoint grounding: high resistance or solid). |
| Review | checking…review by 2027-10-08 · standard cadence |
| Recorded changes | last 2026-10-16 · 3 revisions tracked |
| Claim id | mt-diablo-diablo-400-bipolar-rail-chosen-to |
Where the guide uses it
← Full numbers register — every date-stamped figure in the guide, with revision history.