In summary, Patch cords and test leads are used by many types of electronic professionals. Patch cords and test leads are not designed for handheld applications with more than 33 Vrms applied, but can operate at higher voltages when used in a hands free controlled environments. Shrouded or “sheathed” banana leads have an insulated cover over the conductive plug and are rated for measurements above 33 Vrms with appropriate DMMs. Alligator and grabber jumper cables are used for making temporary connections in electronic circuits, often for debugging, prototyping or testing. Low-thermal EMF cables are used when very precise voltage-control is required, as in calibration. Many other connection types and wire gauges are available for similar types of applications.