- Product Spotlight
Why Accurate Ground Resistance Testing Matters for Electrical Safety
- By Emily Hagel
Proper grounding is the foundation of a safe and reliable electrical system. Without it, fault currents have nowhere to go, equipment can sustain serious damage, and personnel face increased risk of electric shock. Whether you’re working in a utility substation, an industrial plant, or a commercial facility, accurate ground resistance testing is not optional—it’s essential.
At Lakeland Engineering Equipment Company, we provide high-quality testing solutions, including AEMC’s 6417 Ground Resistance Tester, AEMC’s 6416 Clamp-On Ground Resistance Tester with Alarm and Memory, and the AEMC 6240 Micro-Ohmmeter. These instruments deliver the precision and reliability needed to keep people, equipment, and operations safe.
The Importance of Accurate Ground Resistance Testing
Ground resistance testing ensures that your grounding system can effectively carry fault currents safely to earth.
Inaccurate or incomplete testing can lead to:
Increased shock hazards for personnel
Damage to sensitive equipment during faults or surges
Electrical fires caused by poor fault current dissipation
Costly downtime due to preventable failures
Non-compliance with OSHA, IEEE, and NFPA standards
By using AEMC’s advanced testers, you’re not just checking a box—you’re verifying the real-world performance of your grounding system.
AEMC 6417 Ground Resistance Tester
The AEMC 6417 is a clamp-on ground resistance tester that measures ground resistance and leakage current without disconnecting the ground system.
Key Benefits:
No system disconnection required—safe, quick testing
Measures resistance from 0.01Ω to 1500Ω
Leakage current measurement to identify unwanted current flow
Rugged, waterproof design for field environments
Why it matters: The 6417 lets you perform reliable ground testing in minutes, reducing downtime and keeping systems energized during testing.
AEMC 6416 Clamp-On Ground Resistance Tester
The AEMC 6416 offers all the benefits of the 6417 plus advanced alarm and memory functions—ideal for routine inspections and documentation.
Key Benefits:
User-programmable alarms to instantly flag out-of-spec readings
Internal memory stores up to 300 measurements for later download
Large, easy-to-read display for field visibility
Designed for use in tight spaces without dismantling connections
Why it matters: With built-in alarms and data logging, the 6416 helps teams spot and document grounding issues before they become dangerous or costly.
AEMC 6240 Micro-Ohmmeter
The AEMC 6240 Micro-Ohmmeter is ideal for testing bonding connections, busbars, circuit breaker contacts, and other low-resistance points critical to electrical safety.
Key Benefits:
Measurement range from 1µΩ to 2500Ω
Lightweight and portable—perfect for field work
Kelvin connection for highly accurate low-resistance readings
Simple operation with minimal training required
Why it matters: While ground resistance tests verify the path to earth, low-resistance testing ensures the integrity of every conductive connection in that path. Both are critical for complete safety assurance.
Prevent Hazards, Protect Equipment, and Avoid Downtime
Incorporating accurate ground resistance and low-resistance testing into your maintenance routine isn’t just good practice—it’s a safety imperative.
Using AEMC’s advanced testers ensures you can:
✅ Detect and fix poor grounding before it causes harm
✅ Keep sensitive equipment protected from electrical faults
✅ Maintain compliance with industry standards
✅ Reduce downtime caused by preventable electrical issues
Lakeland: Your Partner in Electrical Safety Testing
Lakeland Engineering Equipment Company offers both sales and rentals of AEMC test equipment, along with expert support to help you select the right model for your needs. Whether you need the AEMC 6417, AEMC 6416, or AEMC 6240, we’ll make sure you have calibrated, field-ready equipment when you need it.
Contact us today to learn more about our AEMC offerings or to request a quote.
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