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Trade size 1/2 IMC and RMC use the same fittings. Which of them has the greater wall thickness?

A. IMC
B. RMC
C. Both have the same thickness
D. It depends on the manufacturer

Answer :

Final answer:

The correct option is (b), which is (RMC). RMC (Rigid Metal Conduit) has a greater wall thickness than IMC (Intermediate Metal Conduit), despite both being able to use the same fittings for trade size 1/2. RMC's thicker walls offer higher protection, while IMC presents a lighter, more manageable alternative.

Explanation:

The correct option is (b), which is (RMC). The question asks which of the two conduit types, Intermediate Metal Conduit (IMC) or Rigid Metal Conduit (RMC), has a greater wall thickness when considering trade size 1/2 fittings. The correct answer is b) RMC. RMC is known for its thicker wall compared to IMC.

Despite both types being able to use the same fittings due to their outer diameter being similar, RMC's extra wall thickness provides higher protection, but this also makes it heavier and often more expensive. IMC, on the other hand, was developed as a lighter-weight, easier-to-handle alternative to RMC while still providing substantial protection and support for wiring systems.

Understanding the differences between these two types of conduits is vital in areas such as electrical installation and construction planning, where the choice between IMC and RMC can impact both the physical and financial scopes of a project.

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