![]() ![]() Go up one size once the run reaches more than 50 feet to handle voltage drop, though sometimes it’s better to use 45 feet as the limi Keep the total running length less than 100 feet.30 amps is a common rating for heavy-duty generator extension cords, but you can settle for 50 amp options as well, assuming you’re running hungrier 12,000+W units.Lower-wattage generators are usually rated for the former, while their higher-wattage counterparts run with the latter rating. Most widely available generators run at 110, 115, or 120 volts and 220 or 240 volts.Don’t forget to include the generator’s starting/peak watts and surges when calculating.It would be better to use 10 gauge for all cords to anticipate voltage drop. The power cord’s length and the extension cord should be added to account for the total running length.įor example, it’s not ideal to use a 12 gauge cord with a 1,500W generator if you intend to exceed 100 feet, which you would then connect to an equally extensive 10 gauge extension cord.Most products will readily display both but rarely the amps use the formula A = W / V. ![]() Look at the exact wattage and voltage rating of the portable generator, or any kind of generator for that matter as well as the respective loads you’re going to connect to calculate ampacity.For example, if it peaks at 30A, then use a 10 gauge cord, which is at least rated for that exact ampacity.Īlthough, I always recommend following the last point I’ll make in this list. To keep things simple, always pair a generator with an extension cord that matches its most powerful outlet.When using a portable generator with extension cords, I usually keep it as simple as possible by remembering these pointers: Do’s and Don’ts of Using Extension Cords for Generatorsįactors to Keep in Mind to Determine the Right Gauge to Use.List of Best Extension Cords for Generators.Typical Generator Sizes and Their Recommended Extension Cord Gauges.Factors to Keep in Mind to Determine the Right Gauge to Use. ![]()
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