W WhatSize
Reviewed by Alex Chen & Morgan Webb Updated June 30, 2026
Morgan Webb

Electrical, power & water-systems research lead

Morgan Webb

Research lead for electrical, power, and water-systems sizing. Focus areas are NEC 702 continuous-load rules, motor starting-surge analysis, DOE First Hour Rating for water heaters, and Total Dynamic Head (TDH) pump-curve methodology for sump pumps.

On the team since 2022 152 citations on the site

What Morgan reviews

Domain: Generator, Water Heater, Sump Pump

Methodology

Generator sizing is the most-undersized category on retail sites. The NEC continuous-load margin (125% of running watts) is non-negotiable — undersizing by 20% to save $200 on a generator is the same mistake as saving $50 on a sump pump that fails during a storm.

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