Instead of simply prescribing "put a guard here," the standard now asks the manufacturer to conduct a risk analysis:
A 600V CAT II multimeter is not safe to use on a 600V CAT III line. The standard dictates that CAT III environments have much higher available fault currents (low impedance sources) that can cause arcs and explosions. IEC 61010 forces manufacturers to design input protection circuitry (often using high-energy fuses and MOVs) that can withstand these high-energy transients. iec 610101 standard pdf extra quality
Surface temperature limits (revised to align with EN 563 ). Instead of simply prescribing "put a guard here,"
When purchasing, always select "CSV" (Consolidated Version) or "Redline" PDF. A CSV includes all amendments seamlessly. A standard "Ed 3.0" lacks critical updates to clause 6.7 (protection against mechanical hazards). iec 610101 standard pdf extra quality