New and Improved wire gauges are in!!


Laser cut for improved consistency and printed for easier reading. 


(This means they are no longer made with 3D printers. But, the original videos below still contain useful information.)


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Helpful tips. Watch these videos! 
http://www.inspectionwiregauges.com/videos.html

Gauges designed to help professionals determine sizing of electrical

​wires. 

The set of gauges is designed to help aid inspectors and professionals in determining the size of most modern NM, SE, and THHN-THWN electrical wiring. The design is slim and simple, intended to be minimally invasive. You can use the gauges for visual reference, or as a GO-NO GO verification. 

Please click here to view our instructional

​video. 

Copper Wire Gauges  (Red Color) 1990's to present.

Aluminum Wire Gauges  (Silver Color)

Copper gauges are 3 pieces and cover the following:
Gauge 1 wire sizes:    #14  #12   #10   #8
Gauge 2 wire sizes:   #6   #4   #2   #1
Gauge 3 wire sizes:   #1-0   #2-0 



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Old Copper Gauges (Green Color) 1950's thru 1980's

Old Copper gauges are 2 pieces and cover the following:
Gauge 1 wire sizes:  #14  #12  #10  #8
Gauge 2 wire sizes: #6  #4  #2  #1


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Aluminum wire gauges are 2 pieces and cover the following:
Gauge 1 wire sizes: Modern AL  #6   #4   #2   #1
Gauge 2 wire sizes: Modern  Compact AL SE   #2-0   #4-0

Some aged wiring may have larger jackets. Service wire is the most common. Some specific brands used thicker insulation. 

Now laser cut for improved consistency and easier to read wording.
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"They are a helpful tool. They help my inspectors to determine wire sizing when performing inspections. It took out the guesswork, helped my inspectors build confidence and are easy to use. "
John Shishilla, Honor Services.

Click Here to Purchase Gauges

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Buy Now!

Examples of not so great ideas. 

These are not practical for inspectors. Some are made out of metal. They are also bulky and make it tough to determine a size, in areas where space is limited. 
Many also measure the actual bare wire. 

​Safety Warning and Disclaimer.

Safety First!
Use of these products is not intended or designed for live or energized electrical wiring or devices. In doing so, you could cause damage, injury, or death by electrocution. Always ensure the wiring or equipment you check is de-energized or has no power. Correct PPE should also be worn when performing any work or inspections around electrical components. 

Disclaimer!
The wire gauge sets are designed to be used as a general determination, and accuracy cannot be guaranteed.  This set should work with most NM or residential style wiring within the last 20 years.
​Due to different manufacturers and sizes, it's impossible to accommodate all different types of wiring used. 
Also keep in mind older wiring had a thicker insulation, therefore the gauges supplied will not work with many older wires. 

​Do not force gauges onto wiring or into tight spaces. Doing so can cause breakage or damage to wiring/devices. IF the gauge doesn't fit with ease, then its either an older wire with thicker insulation or it not the correct size.