Southwire 21550T True RMS AC/DC Clamp Meter with Built-In NCV Tester

The Southwire 21550T is a professional-grade 400A AC/DC clamp meter built for the demands of everyday electrical work. Equipped with True RMS accuracy, a built-in non-contact voltage (NCV) tester, and 9 measurement functions, this meter delivers reliable, precise readings whether you're on a job site or troubleshooting a panel.

The built-in NCV tester lets you quickly identify live voltage before making contact with wiring or electrical installations, adding a critical layer of safety. A bright LED worklight and a convenient third-hand test probe holder further streamline single-handed operation in tight spaces.

Key Features:

• 400A AC/DC current range — reads both AC and DC current with True RMS accuracy
• 9 measurement functions — AC voltage, DC voltage, AC current, DC current, resistance, capacitance, temperature, continuity, and diode test
• Built-in non-contact voltage (NCV) tester — detects live AC voltage without direct probe contact
• CAT III 600V safety rating — rated for professional electrical environments
• 4000-count backlit LCD display — easy to read in low-light conditions
• Third-hand test probe holder — clip on the back of the meter holds a probe for hands-free convenience
• Built-in LED worklight — illuminates the work area in dimly lit environments
• REL and Max/Min functions — capture peak and relative readings during load testing
• 1.2 in. jaw opening — fits standard conductors and cable bundles
• Auto power off — shuts down after approximately 15 minutes of inactivity to conserve battery
• 6-foot drop tested — designed to withstand jobsite abuse
• UL/cUL listed — meets UL 61010-1:2012 and EN61326-1:2013 safety standards

Specifications:

• AC/DC Voltage Range: 600V
• AC/DC Current Range: 400A max (40A / 400A ranges)
• AC Current Accuracy: ±2% reading + 9 digits
• DC Current Accuracy: ±2% reading + 5 digits
• Resolution: 0.1A / 10mA (AC & DC current)
• Jaw Opening: 1.2 in. (30.5 mm)
• Bandwidth: 50–400 Hz
• Display: 4000-count backlit LCD
• Operating Temperature: 32–104°F (0–40°C)
• Power: 3 × AAA 1.5V batteries
• Dimensions: 8.48 in. H × 2.91 in. W
• Weight: 0.6 lb
• Insulation: Class 2, Double insulated
• Body: Rubber-coated injection-molded ABS plastic

What's Included: Clamp meter, test leads, type K temperature probe with banana plug adapter, AAA batteries, carrying case, and instruction manual.