Fluke 320 series current clamp cat iii 600vcat iv 300v fluke fluke 323 the fluke 324 true rms clamp meter has been designed to be the best general troubleshooting tools for commercial and residential electricians the 324 will verify the presence of load current acdc voltage and continuity of circuits switches fuses and contacts these small and rugged clamp meters are ideally suited for current measurements up to 400a acdc in tight cable compartments supplied with test leads soft ca