When scaled on an electrical blueprint, what is the scale if a conduit stub-up measures 3-5/8 inches from a wall and is supposed to be 14.5 feet from the wall?

To determine the scale represented on the electrical blueprint, understanding the relationship between the actual measurement and the scaled measurement is crucial. In this situation, the conduit stub-up is supposed to be located 14.5 feet away from the wall, which translates to 14.5 feet x 12 inches/foot = 174 inches in real dimensions. The stub-up measures 3-5/8 inches from the wall on the blueprint.

To identify the scale, it's helpful to examine how many times the scaled measurement fits into the actual measurement. By dividing the actual distance (174 inches) by the blueprint measurement (3.625 inches), the calculation yields:

174 inches ÷ 3.625 inches ≈ 48.

This indicates that the blueprint replicates the actual distance at a ratio that is simpler to express. In scaling terms, this translates to a format often used in architectural and engineering drawings. The scale of 1/4 = 1 ft means that for every 1 foot in real life, it will be represented as 1/4 inches on the blueprint.

Calculating with the chosen scale demonstrates that 1 foot (12 inches) would visually represent 3 inches on the blueprint. Hence, 14.5 feet