Don't push a 15-amp extension cord to its limit.

No, I wouldn’t do that. A 14.5-amp continuous draw is too close to the cord’s 15-amp rating, and for continuous loads the safe rule is 80% — which means 12 amps max.

Here’s the deal: extension cord ratings are for intermittent use, not hours of steady draw. Running 14.5 amps through a 15-amp cord creates heat, and heat builds up over time. That plastic jacket gets soft, insulation degrades, and you’re flirting with a fire. The National Electrical Code (NEC) says continuous loads (more than 3 hours) should not exceed 80% of the circuit rating. That’s 12 amps on a 15-amp circuit, and the same logic applies to extension cords.

Also, cord length kills you. A 50-foot 14-gauge cord at 14.5 amps has noticeable voltage drop, which makes your device work harder and can cause overheating at the plug connections. You might trip a breaker, melt a receptacle, or worse.

If you absolutely must use an extension cord for this device, get a 12-gauge cord rated for 20 amps. Or better yet, plug it directly into the wall. This is not where you save six bucks.