What is the internal diameter of 1/2 inch EMT?

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Multiple Choice

What is the internal diameter of 1/2 inch EMT?

Explanation:
In EMT sizing, the nominal size of 1/2 inch doesn’t equal the actual inside space. The tube’s outside diameter is about 0.706 inches and the wall thickness is around 0.042 inches. To find the internal diameter, subtract twice the wall thickness: 0.706 - 2×0.042 = 0.706 - 0.084 ≈ 0.622 inches. So the internal diameter is approximately 0.622 inches.

In EMT sizing, the nominal size of 1/2 inch doesn’t equal the actual inside space. The tube’s outside diameter is about 0.706 inches and the wall thickness is around 0.042 inches. To find the internal diameter, subtract twice the wall thickness: 0.706 - 2×0.042 = 0.706 - 0.084 ≈ 0.622 inches. So the internal diameter is approximately 0.622 inches.

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