It is a common misconception for people to think that as long as the ends of the wire fit a connector, there will be no issues. It is not the case for circuit breakers. People unaware of their importance often use too small gauges to connect their circuit breakers. Smaller diameter ones are cheaper than the bigger ones. Unaware people often go for the cheaper ones, thinking it will not make any difference. Sadly, it will only cost them more in the long run.
Using a larger one for your circuit breaker is often the best way to go. The only negative effect this has is your budget, which will cost you more upfront. When picking a larger one, you spend more than what you may need. However, it will not cause any damage to your circuit breaker. Instead, it can better handle the electrical current flowing through it.
When you’re going with a copper or aluminum wire longer than 100 ft, you’ll want to make sure to consider the voltage drop.
But if you find yourself having the incorrect one, here are the things that might happen.
| Consequences | |
| Drop-in performance | Melted insulation |
| Fire | Damaged equipment |
A drop in performance
If you connect appliances to a circuit breaker using too small one, achieving peak efficiency may be impossible. The appliances can only receive a part of the energy required to operate at peak performance. In effect, your appliances will be unlikely to achieve their optimal performance.
You may have a 15 amp circuit breaker that you need to use for light fixtures at home. At best, using anything less than the recommended 14-gauge could lead to performance issues. For electric furnaces, you need at least a 4 because of the amount of current they consume.
Make sure to see what the requirement are, whether you are welding or powering a metal lathe. If not, you might be using the wrong cord. It could lead to suboptimal performance, at best.
It can start a fire
Fire is the worst-case caused by a burning electrical component that starts. Although modern circuit breakers have safety measures, they may not be enough if the load is too much.
A common safety measure for modern circuit breakers is the trip mechanism. When the circuit breaker experiences an overload, it will trip to cut the current from passing through. It helps prevent any damage from happening. However, having a trip mechanism does not fully prevent a fire from happening.
Melted insulation
A smaller diameter can handle less current, making them more resistant to energy flow. If the diameter is way smaller for your circuit breaker, the current flowing is more than it can handle. Due to high resistance, heat generates and will eventually lead to melting.
Damage to the equipment
Aside from performance drop issues and the possibility of starting a fire, using a smaller one may damage your equipment. When the power supply is not stable, it may bust your equipment.
Standard wire gauge chart
You should know that it is important to have a licensed electrician handle any electrical work. It helps to know some basic electrical things, such as the right gauge. The chart electricians use as their reference will differ depending on the region.
Using a standard measurement instrument is easy to answer your questions about the product’s diameter. We use the AWG system in the United States to determine it. The AWG defines the diameter of solid round wires, otherwise known as the gauge. Given the various conditions, the capacity is the highest current it can handle. The material it was made from, and the ambient temperature is important factors.
When referring to the table below, note that the AWG value is opposite to the diameter. A higher AWG refers to a smaller diameter. It means an 8-gauge can support a higher capacity than a 10. The chart below defines the diameter in inches and millimeters. The chart should help determine which one to choose.
The one with the largest diameter is the 0000, while the smallest is the 40. The former lets more energy flow through it at any given time than the smaller ones will.
