In Single-Phase Motor Installations, the Branch-Circuit Protection Is Based on NEC

question 12

Essay

In single-phase motor installations, the branch-circuit protection is based on NEC Table 430.52 as a percentage of full-load current. (Note: Full-load current referred to here is the Code book value.) The full-load current is listed in Table 430.248 for single-phase motors. If using a typical inverse time breaker, the percentage for single-phase motors is 250% of the Code book value for the size of the motor at the connected voltage.
Briefly explain why this high percentage is allowed.

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Definitions:

Disperse Spores

The act of spreading spores widely, especially those of fungi, mosses, and ferns, to propagate new individuals.

Flagellated Spores

Spores that are equipped with flagella (tail-like structures), allowing them to swim in a moist environment, commonly found in certain fungi and algae.

Aquatic Decomposition

The breakdown of organic matter in water environments by microorganisms and enzymes.

Chytrids

Fungi with flagellated spores.