| Very light indoor use |
Up to about 600 W ≈ 5 A |
18 AWG, 2-conductor or 3-conductor cord rated at least 10 A |
Lamps, phone chargers, small electronics, and low-power office equipment |
3–6 ft |
Use a grounded 3-conductor cord for appliances with a grounding plug. Do not use for heating appliances or motor-driven tools. |
| General household use |
Up to about 1,200 W ≈ 10 A |
16 AWG, 3-conductor cord rated around 13 A |
Monitors, desktop equipment, small fans, televisions, and low-power kitchen devices |
3–10 ft |
Check the cord label and the appliance nameplate. Avoid connecting several high-wattage devices to one cord. |
| Higher-power household use |
Up to about 1,500 W ≈ 12.5 A |
14 AWG, 3-conductor cord rated at least 15 A |
Single high-load appliance used temporarily, such as a portable heater or vacuum |
3–6 ft |
Use only when the cord, plug, receptacle, and circuit are rated for the load. Portable heaters should normally be plugged directly into a wall receptacle. |
| Light-duty outdoor use |
Up to about 1,200 W ≈ 10 A |
16 AWG, 3-conductor outdoor-rated cord with weather-resistant jacket |
Outdoor lighting, small garden equipment, and occasional low-power tools |
6–25 ft |
Use a weather-resistant cord and GFCI-protected receptacle. Keep connections away from standing water and do not leave the cord in wet conditions. |
| Power tools and moderate motor loads |
Up to about 1,500 W ≈ 12.5 A |
14 AWG, 3-conductor cord rated at least 15 A |
Drills, circular saws, sanders, and other short-duration tools |
6–25 ft |
Motors can draw more current when starting. Keep the cord fully uncoiled, inspect it before use, and choose a heavier gauge for longer runs. |
| Heavy-duty tool or equipment use |
Up to about 1,800 W ≈ 15 A |
12 AWG, 3-conductor cord rated 15 A or higher, subject to the cord label |
High-demand tools and equipment requiring a short, robust connection |
6–25 ft |
Confirm the equipment instructions, plug configuration, circuit rating, and cord rating. Do not exceed the lowest-rated component. |
| Temporary low-voltage equipment |
Determined by the adapter or power supply |
Choose the cord based on the adapter's input current, not only the device's output rating |
Networking equipment, displays, audio equipment, and charging stations |
3–10 ft |
Use a grounded cord when required by the adapter. Keep ventilation openings clear and avoid using damaged plugs or loose connections. |
| Loads requiring a dedicated circuit |
More than about 1,800 W at 120 V More than 15 A |
Do not select a standard short extension cord without qualified electrical guidance |
Large heating appliances, compressors, welders, and permanently installed equipment |
Not recommended |
Use the manufacturer's wiring method or have the circuit evaluated by a qualified electrician. Never bypass a breaker or use an adapter to change plug configuration. |