The best tool used to measure 15 feet of wire is a?

The best tool for measuring 15 feet of wire is a measuring tape. Measuring tapes are specifically designed for measuring longer distances accurately and with flexibility, allowing the tape to easily follow the contours of the material being measured.

A measuring tape typically has both feet and inches marked, making it easy to measure up to 15 feet or even longer without difficulty. They are also portable and can be easily stored, making them practical for electricians and other tradespeople who need to take precise measurements in various settings.

While a yard stick can measure up to 3 feet, it would require multiple readings to measure 15 feet accurately, which can introduce errors and inefficiencies in the process. A slide rule is not designed for measurement of physical lengths; it is more for calculations. A weight scale is meant to measure mass or weight, not length, making it unsuitable for the task at hand.