Bests & Worsts Reviews from Amazon

The 100 foot spool I received was marked Monoprice (and made in China). I measured the length as 99 feet. Took a sample. Shorted one end and measured the 197 foot round trip resistance at 490 milliohms (with a properly nulled DVM). That is 2.49 ohms per thousand feet, which is AWG 14 copper, not AWG 12. This is my objection. I am using this for DC power distribution and the voltage losses at 14 gauge are 50% more than 12 gauge. Scraped it, cut it, looked under microscope. Seems like copper, not CCA. Harder to see with these thin wires, but I do see some silvery inclusions. Maybe burr coming off of the xacto knife. Measured the conductor weight at 6 grams per foot (i.e., 12 grams for the two conductors in a one foot sample). Should be 9 grams per foot for AWG 12 copper. The jacket weighs 9 grams per foot. (I checked my scale (and thinking) with two feet of solid AWG 12 romex bare conductor; that read 18 grams) It is constructed of 5 bundles, grouped 19, 17, 17, 17,17, totaling 87 strands. Makes a flexible but loose weave. Based on the measured resistance these are AWG 33 strands of copper. Bottom line is they claim AWG 12 but the deliver only 63% of the conductor they advertised, which is a huge lie. They claim a cross section of 3.0 mm square, which is the proper value for solid copper AWG 12, but their defense must be they are including the air between the strands in the measurement. AWG 12 copper should deliver 1.6 ohms per 1000 feet, not 2.5.