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Which type of armored cable is listed under UL 4, a prescriptive standard, with permitted conductor sizes of 14 AWG through 1 AWG only?

A. AC
B. Continuous corrugated armor
C. MC
D. Steel wire armor

Answer :

Final answer:

The correct type of armored cable listed under UL 4 with permitted conductor sizes of 14 AWG through 1 AWG is MC cable. This type provides effective insulation and protection for the wires it encases. Other options like AC, Continuous Corrugated Armor, and Steel Wire Armor do not meet these specific standards.


Explanation:

Types of Armored Cable Under UL Standards

The question specifically refers to armored cables listed under UL 4, which is a prescriptive standard for certain types of insulated conductors. Among the options given, the type of armored cable that is listed under UL 4 is MC (Metal Clad) cable.

MC cable is known for its ability to provide excellent protection for conductors while allowing for a range of conductor sizes from 14 AWG to 1 AWG. On the other hand, AC (Armored Cable), Continuous Corrugated Armor, and Steel Wire Armor do not fit the criteria set by UL 4 concerning the specified conductor sizes.


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