Home-Mining Circuit & Outlet Reference (NEMA, 120V & 240V)
Which outlet and breaker can run your Bitcoin miner? A reference for North-American NEMA outlets with voltage, amperage and the real continuous wattage available under the 80% rule. Free CSV/JSON + REST under CC BY 4.0.
Quick answer
Before plugging in a Bitcoin miner at home, the outlet and breaker have to handle it — continuously. Because mining is a continuous load (runs >3 hours), the electrical code (NEC in the US, CEC in Canada) limits you to 80% of the circuit's rating, so a 120V/15A outlet safely supplies about 1,440 W, not 1,800 W. This reference lists 10 North-American NEMA outlets a home miner is likely to use with their voltage, amperage and the real continuous wattage available. The headline: 240V circuits (NEMA 6-/14-/L6-) give you far more usable power per outlet and miners run more efficiently on them, which is why most home mining beyond a Bitaxe moves to 240V.
A normal 120V/15A wall outlet (NEMA 5-15) tops out near 1,440 W continuous — fine for a Bitaxe, not for an S19/S21-class miner. Move to 240V (NEMA 6-20/6-30 or a repurposed dryer/range 14-30/14-50 circuit) for real mining capacity and better efficiency. Size the breaker for 125%% of the continuous load, and have a licensed electrician confirm the work.
Download CSV Download JSON REST API →
| Outlet | Volts | Amps | Max continuous (W) | Common use | Mining note |
|---|---|---|---|---|---|
| NEMA 5-15 | 120V | 15A | 1440 | Standard North-American household outlet | The default home outlet. ~1,440 W continuous — enough for a Bitaxe or a couple of small units, but a single S19-class miner exceeds it. |
| NEMA 5-20 | 120V | 20A | 1920 | 20A kitchen/garage outlet (T-slot) | Handles one 120V-capable miner with a little headroom; common in garages and workshops. |
| NEMA 6-15 | 240V | 15A | 2880 | 240V appliance outlet | One S19/S21-class miner at 240V (miners run more efficiently on 240V). |
| NEMA 6-20 | 240V | 20A | 3840 | 240V tools / window AC | Comfortably powers one S21-class miner at 240V with headroom. |
| NEMA 6-30 | 240V | 30A | 5760 | 240V heavy appliance | One large hydro miner, or two air miners, on a single 240V circuit. |
| NEMA 6-50 | 240V | 50A | 9600 | Welder outlet | Enough for several miners or a small mining PDU on 240V. |
| NEMA 14-30 | 240V | 30A | 5760 | Clothes-dryer outlet (4-wire) | A very common existing 240V circuit to repurpose for mining — ~5.7 kW usable. |
| NEMA 14-50 | 240V | 50A | 9600 | Electric range / EV charger | A common high-capacity outlet; runs a small mining setup or PDU. Don't share with the EV at full load. |
| NEMA L6-20 | 240V | 20A | 3840 | Locking 240V connector | Twist-lock 20A/240V — a secure connection that won't pull out, common on mining gear. |
| NEMA L6-30 | 240V | 30A | 5760 | Locking 240V connector | Twist-lock 30A/240V — a frequent choice for mining PDUs and rack power. |
Pair this with D-Central’s home-mining circuit planner (works out how many miners fit a circuit) and the Bitcoin space-heater guides. North-American NEMA standard (used in Canada and the US); continuous wattage applies the NEC/CEC 80%% rule. Informational only — always have a licensed electrician verify your wiring.
Related products, repair, and setup paths
- how D-Central diagnoses ASIC repairs
- ASIC troubleshooting library
- ASIC manuals and repair guides
- replacement hashboards
- ASIC control boards
- ASIC power supplies
- S19 family replacement hashboard
- C52 replacement control board
- APW12 S19 power supply
- immersion cooling hub
- home immersion cooling guide
- ASIC miners for immersion planning
- ASIC cooling parts
- airflow shroud before immersion
- compare miner specs in the database
- ASIC repair support
- compare ASIC miner specs
- ASIC miner database
- Antminer S19 specs and profitability
- buy a tested Antminer S19
- Antminer S19 maintenance guide
- Antminer S19 repair service
- Antminer S21 specs
- Bitmain Antminer S21
- Antminer S21 maintenance guide
- BM1370BC S21 Pro chip
Last reviewed June 19, 2026.