Why capacity changes the circuit
A larger cabin usually needs more heater output and surface coverage. The Maxxus AMZ-MX-K306-01 and corner AMZ-MX-K356-01 documentation specify 120V/20A dedicated service, unlike many compact 15A cabins.
A 20A receptacle is not proof of a 20A circuit
Confirm the breaker, wiring, receptacle, and exclusivity of the circuit. Do not install a different receptacle or use an adapter to make a plug fit.
Plan power before delivery
Give an electrician the exact manual, nameplate load, plug image, and proposed location. Complete required work before cartons arrive so the assembled cabin can be tested without a temporary cord.
Sources and documentation
Specifications, claims, and installation requirements can change. Confirm the current manufacturer manual for the exact model and variant.