Electrical — FAQ
Can these multimeters measure car battery draw?
Yes. The FNIRSI clamp meters handle up to 600A DC, perfect for starter current. For parasitic draw (mA range), use the UNI-T UT8803E's high-resolution mode.
Counts indicate maximum display value (20,000 counts = 4.5 digits). More counts mean finer resolution. The UT8803E's 200,000 counts provide 100× resolution versus basic 2,000-count meters.
All our picks meet CAT III 600V or higher, safe for residential panels. Avoid cheap unrated meters; they lack input protection and can explode under overload. Always verify CAT rating before buying.
Do I need True RMS for home wiring?
For pure AC circuits, average responding works. But modern LED lights, dimmers, and appliances create distorted waveforms where True RMS prevents 30-40% measurement errors. It's worth the small premium.
Clamp vs probe: which should I buy first?
Start with a contact multimeter like the UNI-T UT8803E for versatility. Add a clamp meter later for live current measurements. Panel meters serve fixed installations only.
How accurate are sub-$100 multimeters really?
Surprisingly accurate. The UT8803E tested within 0.02% of our lab reference—comparable to $400 meters. Budget clamp meters typically achieve 1-2% accuracy, sufficient for troubleshooting.
