In this situation the best thing you can do is compare the two. but id be cautious of the wall mart wire, For that price there could be more plastic than copper, so you wont have the current capacity. however there may be no difference.
14 Gauge should measure as 14 Gauge if advertised, so if you find it isn't, then complain!! why should you get ripped off.
Some cable will be made from different size strands of inner conductor, and some companies will try and sell a really cheap version, just make sure the actual diameter of the copper is 14 gauge.
Also the plastic will have temperature tolerances, and chemical resistances, Check out tri-rated cable....
Here is a little example of the tri-rated cable, a 10mm diameter cable, (AWG 8) can take a max current of 79A and costs £1.04/meter.
Your AWG 14, is 1.5mm squared, and can take 24A max, and costs £25.01 per 100Meter reel.
thats good 105'c rated cable.
14 Gauge should measure as 14 Gauge if advertised, so if you find it isn't, then complain!! why should you get ripped off.
Some cable will be made from different size strands of inner conductor, and some companies will try and sell a really cheap version, just make sure the actual diameter of the copper is 14 gauge.
Also the plastic will have temperature tolerances, and chemical resistances, Check out tri-rated cable....
Here is a little example of the tri-rated cable, a 10mm diameter cable, (AWG 8) can take a max current of 79A and costs £1.04/meter.
Your AWG 14, is 1.5mm squared, and can take 24A max, and costs £25.01 per 100Meter reel.
thats good 105'c rated cable.