Generator Power Cord Buying Guide

Those new to portable generators might assume any standard cord from a local hardware store can be used to connect appliances during an outage. 

The reality is that not all generator power cords are created equal. It is not that some are inherently worse than others, but rather that not all are appropriate for every generator. Selecting the incorrect extension cord can result in wasted power or damage to both the generator and the appliances. 

Fortunately, selecting a generator power cord is simple if these steps are followed: 

Select the Right Generator Cord Amps 

While portable generators are measured in watts, generator power cords are measured in amps. The higher the amperage, the more electricity the cord can handle. 

For example, a 50-amp power cord is significantly thicker than a 20-amp power cord. This allows it to handle a larger wattage and support more appliances. 

Each outlet on a generator has a specific number of amps it can handle. A power cord should be selected that matches the most powerful outlet on the generator. 

If a generator has a 50-amp outlet, a 50-amp power cord is required. If it has a 20-amp outlet, a 20-amp cord should be used. Choosing a lower-amp extension cord will result in wasted power potential and possible damage to the equipment. 

Select the Right Generator Cord Shape 

Plugs and connectors are purposely designed in different shapes to help prevent an electrical overload. 

If a generator features a 30-amp or 50-amp outlet, special attention must be paid to the shape of the plug. 

For example, 30-amp plugs come in two varieties: 3-prong and 4-prong. 

The 3-prong plugs carry 120 volts only, while the 4-prong plugs carry 120/240 volts. The 4-prong varieties are becoming more popular as homes increasingly feature 240-volt outlets or appliances. 

If a 50-amp outlet is present on a portable generator, a special power cord with two different ends will most likely be required. The straight-blade male plug fits into the generator, while the twist-lock female connector fits into a transfer switch or power inlet box. 

Plugging In 

Before connecting any appliances, confirm that the generator cord is undamaged, checking specifically for cuts and frays. Using a damaged cord can result in electric shock. 

By paying attention to the cord's amperage and shape, and by following safety precautions, users can ensure they remain powered and safe.