A while back I asked about corded electric lawn mowers. Over Memorial Day weekend, I bought a Kobalt mower at Lowe's that had better reviews than other corded mowers I could find. The mower is rated at 13 amps. I figure that I need a 75 foot extension cord to reach the edges of my small lawn. Lowe's only had 50 and 100 foot cords, and the guy working in the mower section recommended a 12 gauge cord for 100 feet. I considered buying a 50 foot and a 25 foot, but that was much more expensive than a 100 foot so I bought the 100. When I unpacked the mower and looked at the owner's manual, it recommended 12 gauge wire for a 50 foot cord and has no recommendation for 100 feet (a dash in the chart where the recommended gauge should appear). It is a little odd that the owner's manual is for this mower only, but contains a chart with recommendations for cords for products as low as 2 amps. For a 7.1 amp to 12 amp tool, it recommends 10 gauge wire for a 100 foot cord. I plan to return the cord I bought and get a 10 gauge extension cord. Do those of you with electrical knowledge think that would be adequate at 100 feet? If not, how about getting a 50 foot and 25 foot at 10 gauge and using the extra 25 only when needed? I see that extension cords are much cheaper on Amazon than at Lowe's. Are there variables other than wire gauge that I should look at before buying?
Thanks in advance for any advice you can offer!