Reading and comparing mixed numbers in inches means adding the whole inches to the fractional part. Convert each to a common form to see which matches 79 1/2. 78 5/8 equals 78 + 5/8 = 78.625 inches. 79 1/2 equals 79 + 1/2 = 79.5 inches. 80 3/8 equals 80 + 3/8 = 80.375 inches. 81 3/4 equals 81 + 3/4 = 81.75 inches. 79 1/2 inches is exactly 79.5, so that option matches the target. If you prefer fractions, 79 1/2 is 79 4/8, while the others are 78 5/8, 80 3/8, and 81 6/8—different values.

When routing conduit around an obstacle, you use fittings that create a smooth bypass path rather than forcing the conduit to bend sharply at the obstruction. A three-bend saddle does exactly that by wrapping around the obstruction with three bends, letting the conduit arc around small protrusions without pinching or kinking. This design works well for both cylindrical and square (or rectangular) obstructions because the middle bend can cradle the obstacle while the outer bends tie the conduit back into the run. That flexibility is why it’s used for small cylindrical and square obstructions. It isn’t aimed at large-diameter pipes, which would require a different approach, and it isn’t limited to rectangular obstructions since it also accommodates cylindrical ones. So the statement is correct.

The important idea here is confirming safety through two linked checks: that the grounding path is continuous and that insulation remains intact. A grounding path continuity test verifies that the protective earth conductor forms a solid, low-resistance path back to the earth, ensuring the equipment will fault to ground properly if something goes wrong. Alongside that, an insulation resistance test checks the insulation around conductors to detect any breakdowns or moisture paths that could cause leakage currents or shocks. Visual inspection alone cannot prove these electrical conditions, and a voltage drop test looks at performance under load rather than proving grounding continuity or insulation integrity. It may reveal issues under certain loads, but it doesn’t directly verify the grounding path or insulation health. So, the best approach after installation is to perform a continuity test for the grounding path to ensure a reliable earth connection, together with an insulation resistance test to confirm insulation integrity. This combination gives a clear picture of both safe grounding and proper insulation.

Think of a mixed number as whole inches plus a fractional part. 81 3/4 inches means 81 inches plus 3/4 inch. Since 3/4 is 0.75, the total is 81.75 inches. Convert the other options to decimals to compare: - 78 5/8 equals 78.625 - 79 1/2 equals 79.5 - 80 3/8 equals 80.375 The one that matches 81.75 inches is the option with 81 3/4 inches.