Observed arrival · 2026-10-14
Electrical Load Calcs: a residential service-capacity calculator
A browser-based calculator estimates residential electrical loads using selected NEC 2023 methods and can produce a step-by-step PDF report.
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- For
- Electricians and homeowners assessing dwelling service capacity
- Worth noticing
- For 220.87, it asks for recorded maximum demand and distinguishes kVA, kW at power factor 1, and highest-leg amperes.
Field notes
The form separates existing from added equipment and asks users to account for HVAC entries according to the selected method. Its guidance flags several commonly conflated values: for example, it says a heat pump’s heating output, MCA, and breaker rating are not nameplates, and asks users to remove replaced equipment from the existing inventory. The page also states that optional report details are never saved or shared.
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
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