{
    "meta": {
        "title": "Hashcenter 3-Phase Power Reference",
        "description": "Standard commercial 3-phase voltage systems (5) a Hashcenter runs on — line-to-line and line-to-neutral voltages, how a single-phase miner connects, and the continuous-load electrical framing — plus common PDU form factors.",
        "generated": "2026-07-03T03:34:54+00:00",
        "version": "1.0",
        "license": "https://creativecommons.org/licenses/by/4.0/",
        "license_name": "CC BY 4.0",
        "source": "https://d-central.tech/hashcenter-power-planner/",
        "record_count": 5,
        "method": "Total 3-phase apparent power: kVA = √3 × V_LL × I_line ÷ 1000. Usable continuous power applies the 80% continuous-load derate (CEC Rule 8-104 / NEC 210.19-210.20 & 215): usable kVA = √3 × V_LL × I_line × 0.80. Individual ASIC PSUs are SINGLE-PHASE loads distributed across the three phases to balance them; per-branch sizing stays single-phase. ASIC wall watts are single-sourced from the D-Central ASIC Power & Electrical Requirements dataset (Bible-grounded).",
        "disclaimer": "SAFETY-CRITICAL, INFORMATIONAL ONLY. Nominal voltages follow ANSI C84.1 / IEC 60038; PDU amperages are standard NEMA / IEC 60309 catalog ratings, not a D-Central specification. Code citations (CEC Rule 8-104; NEC 210.19(A), 210.20(A), 215.2/215.3, Article 220) reflect the continuous-load rule intent — verify the current code edition and local amendments (in Québec the CEC is adopted with amendments under the Code de construction du Québec, Chapitre V – Électricité). A licensed electrician MUST design, size and verify every service, feeder, transformer and branch circuit."
    },
    "voltage_systems": [
        {
            "system": "208Y/120V wye",
            "v_ll": 208,
            "v_ln": 120,
            "v_branch": 208,
            "connection": "Miner connects line-to-line (across 2 of the 3 phases) at 208V",
            "note": "The most common North-American commercial building service (4-wire wye). 120V line-to-neutral feeds standard receptacles/lighting; 208V line-to-line feeds the miners. NOTE: 208V is below the 220–240V many PSUs target — an APW12 (200–240V) and APW17 (200–277V) run fine at 208V, but at 208V a miner draws ~15% more current than at 240V for the same watts (240/208≈1.154), so size branch conductors/breakers on the 208V current. A few 220–240V-minimum PSUs may under-deliver or not start at 208V — confirm the PSU input range."
        },
        {
            "system": "240V delta (3-phase, high-leg)",
            "v_ll": 240,
            "v_ln": 120,
            "v_branch": 240,
            "connection": "Miner connects line-to-line at 240V",
            "note": "A 4-wire center-tapped \"high-leg\" (a.k.a. wild-leg / red-leg) delta, common in older industrial and rural services. Two phases give 120V to neutral; the third \"high leg\" reads ~208V to neutral (240×√3⁄2 ≈ 207.8V) and must NEVER feed 120V loads or a standard neutral-referenced circuit. Miners take the full 240V line-to-line, which suits 220–240V PSUs well."
        },
        {
            "system": "415Y/240V wye",
            "v_ll": 415,
            "v_ln": 240,
            "v_branch": 240,
            "connection": "Miner connects line-to-neutral at 240V",
            "note": "A wye service where each phase-to-neutral is 240V — so a single-phase miner connects line-to-neutral and sees a clean 240V with NO step-down transformer. Standard in much of the world and increasingly used at large North-American sites precisely because it feeds 240V miners directly while balancing three phases. (International/IEC framing; verify local code applies.)"
        },
        {
            "system": "400Y/230V wye",
            "v_ll": 400,
            "v_ln": 230,
            "v_branch": 230,
            "connection": "Miner connects line-to-neutral at 230V",
            "note": "The IEC / European standard three-phase service (400V line-to-line, 230V line-to-neutral). Miners connect line-to-neutral at 230V, no step-down needed. Included for international Hashcenter planning; North-American installs use 208V or 240V."
        },
        {
            "system": "480Y/277V wye",
            "v_ll": 480,
            "v_ln": 277,
            "v_branch": 0,
            "connection": "Requires a step-down transformer (480V → 208V or 240V) feeding a miner sub-panel",
            "note": "A large industrial / utility-scale service. Miners CANNOT run directly on 480V, and the 277V line-to-neutral is for commercial lighting only. Large Hashcenters take 480V, then step down through a transformer to a 208V or 240V sub-panel that feeds the miner PDUs. The service kVA still follows the √3 formula; the transformer and the 208/240V secondary are sized to the miner load (≥125% continuous). This planner reports how many miners the 480V service can feed through such a transformer, but the per-branch sizing happens on the secondary."
        }
    ],
    "pdu_forms": [
        {
            "form": "Single-phase 208/240V rack PDU",
            "input": "NEMA L6-20 / L6-30 or IEC 60309 2P+E (blue) inlet",
            "std_ratings": "20A · 30A · 50A · 60A",
            "outlets": "IEC C13 / C19",
            "note": "The simplest option: one single-phase 208V or 240V branch runs a small string of miners. You balance phases at the PANEL by feeding different PDUs from different phase-pairs."
        },
        {
            "form": "3-phase 208V wye PDU",
            "input": "IEC 60309 3P+N+E (4P+E) pin-and-sleeve inlet",
            "std_ratings": "30A · 50A · 60A (IEC 60309 families: 32A · 63A)",
            "outlets": "IEC C13 / C19, internally split across the 3 phase-pairs",
            "note": "One 3-phase feed; the PDU distributes its 208V (line-to-line) outlets evenly across A-B / B-C / C-A so the miners it powers are inherently phase-balanced. The single most common Hashcenter rack PDU."
        },
        {
            "form": "3-phase 415/400V wye PDU",
            "input": "IEC 60309 3P+N+E pin-and-sleeve inlet",
            "std_ratings": "32A · 63A (IEC 60309)",
            "outlets": "C13 / C19 at 240V (415V) or 230V (400V) line-to-neutral",
            "note": "Feeds 240V/230V miners line-to-neutral with no step-down. Common internationally and at large sites; the PDU balances outlets across the three phases."
        }
    ]
}