Ohm's-law screening current at an assumed 1,000 ohm body resistance: about 800 mA at 800 VDC versus about 48 mA at 48 VDC; injury depends on path, duration and actual contact impedance
≈800 mAderived
| Value kind | derived — Derived values are guide calculations; their result is only as fixed as the stated inputs, scope, and method. |
|---|---|
| Scope | Illustrative Ohm’s-law arithmetic at an assumed 1,000 Ω; potentially fatal exposure, not a prediction of current through a person, an injury threshold, a DC arc model or permission for exposed work. The source’s protective-grounding context does not become a rack-maintenance procedure. |
| As of | 2026-08-24 |
| Source | U.S. Occupational Safety and Health Administration, 29 CFR 1926 Subpart V Appendix C, 2025 CFR edition, III.D.1, printed p. 509; GovInfo final text read September 8, 2026. · Appendix C, III.D.1, printed p. 509: assumed body resistance and impedance variability |
| Derivation | Guide derivation: I=V/R at an illustrative 1,000 ohm resistance gives 800 mA and 48 mA. Actual current and harm vary with contact impedance, path and duration. |
| Review | checking…review by 2026-12-22 · standard cadence |
| Recorded changes | last 2026-09-16 · 3 revisions tracked |
| Claim id | body-current-from-800-vdc-contact-1-000 |
Where the guide uses it
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