Home Service-Capacity Planner: How Many Miners Can My Panel Add?

Method & the honest caveat. This planner uses the conservative continuous-load budget: a 240 V service can carry a continuous load up to service amps × 240 × 0.8 (NEC’s rule that a continuous load must not exceed 80% of the branch/feeder rating). It subtracts the existing continuous load you enter, then divides the remainder by the miner’s wall watts. 🔴 This is a planning estimate, NOT a code load calculation. The actual residential method — NEC 220.83 (adding a load to an existing dwelling: the first 8 kVA of total load counts at 100%, the remainder at 40%) or the Canadian CEC 8-200 single-dwelling calculated load with 8-106 demand factors — applies demand factors that usually let you add more than this shows, so treat this number as a conservative floor. A miner is a continuous load, so each unit needs its own dedicated 240 V circuit sized at 125% of its draw — size that with the circuit planner, and check the run with the voltage-drop calculator. A licensed electrician must run the formal service load calculation (NEC 220 / CEC 8-200) and pull a permit before you add a mining load; local code governs (the CEC in Canada). Estimates only, not an engineering stamp. Related: ASIC power requirements.