True RMS measurements, optimized ergonomics, and a backlight display make the Fluke 324 Clamp Meter a great general purpose troubleshooting tool for commercial and residential electricians. Designed to perform in the toughest environments and provide noise-free, reliable results, you can trust the 324 to help you confidently diagnose problems. Use it to verify the presence of load current, AC voltage and continuity of circuits, switches, fuses and contacts and to measure temperature and capacitance. Its slim, compact size and rugged design make it well suited for measuring current up to 400 A in tight cable compartments.