It goes without saying that gauge selection is of prime importance for extension cords. The gauge defines the capacity of the cord to accept electrical current safely. Knowing the gauge size may prevent circuit overloading or creating unsafe conditions.

If you ever want to know about extension cord gauges and gauge numbers, this article will cover what each size means and what each is used for.

When planning to use extension cords indoors or outdoors, the safety of extension cords begins with selecting the right gauge. Should you use a 16-gauge cord, or is an 18-gauge cord more suitable? Let’s get started.

Extension Cord Reference Guide

It is important to review the basic terms required to choose the right extension power cords before discussing the classification and types of extension cords.

Ampere (Amp):

The unit for measuring electric current. It means the quantity of electricity that is passing through a wire. An extension cord has ratings regarding the highest amperage, which one can safely run through.

Wattage (Watts):

This basically refers to the power output of consumed amperage electric appliances or gadgets. To obtain wattage, multiply the amperage (Amps) by the voltage (Volts).

Voltage (Volts):

Voltage signifies the electrical force propelling the current through the wire.

Types of Extension Cords

Different extension cords are available, each designed for specific purposes and settings. Here's a look at some common types:

Indoor Extension Cords:

For general indoor use only, these cords are best for the service and not likely to do well when used outdoors because they lack weatherproof features. In most cases, they come in a very thin gauge, which makes them very light and flexible.

Outdoor Extension Cords:

Outdoor extension cords are designed to withstand the elements of the outdoors, such as rain, snow, and sunlight. They contain thicker insulation and rugged outer jackets to resist moisture, while they also include factors that cause physical damage. They also come rated at higher electrical loads than indoor cords.

Heavy-Duty Extension Cords:

These are used in power, heavy tools, industrial machinery, and appliances. They are constructed with a thicker gauge wire and rugged construction to resist rough use in harsh conditions.

Light-Duty Extension Cords:

These are meant for light loads like lamps, small appliances, electronic items, etc. They use thinner gauge wire and hence may not be rugged as in the case of heavy-duty cords. They are cheaper and more apt for occasional use at residential places.

Multi-Outlet Extension Cords:

They have more than one outlet along their length. They allow various appliances to be used from one source and are useful for a garage or workshop and some other places outdoors.

Specialty Extension Cords:

There are cords designed for specific needs, including:

Flat Extension Cords:

The slim, compact design easily hides underneath a carpet or rug, making them ideal for an aesthetic-conscious environment, such as a home or office.

RV Extension Cords:

Tailored for use with recreational vehicles, such often have some sort of connection lock and include weatherproofing against outdoor elements.

Generator Extension Cords:

These are designed in a way that they get connected between portable generators and appliances or power panels. The key features include alligator clips or NEMA connectors at one end and the other with heavy-duty, built to be as powerful as the generators.

Specialized Extension Cords:

There are cords for specific applications, such as:

Air Conditioner Extension Cords:

They deal with a heavy electrical load, which is a thermostat-controlled air conditioner, and hence, they often come with in-built surge protections.

Welding Extension Cords:

These are tailor-made for welding equipment and can support high currents that occur when one is doing a welding job.

The choice of extension cord for this matter should be due to the kind of work it will be put to, the electrical load of the appliances tojsonified, the length of cord required, and whether it is to be used inside a building or outside. Incorrect extension cord usage is potentially dangerous. It may even lead to device damage or cause electric shock or fire. Always heed the manufacturer's instructions before use.

How to Choose the Right Extension Cord