This test accessory from Chauvin Arnoux consists of a red test lead with a length of 50 metres, wound onto a drum. The drum is equipped with a handle to facilitate transport and handling. The product is specifically designed for measuring earth resistance and specific earth resistance, serving as a supplement to earth resistance measuring instruments operating according to the 1-, 3- or 4-wire method. The red colour corresponds to the standard colour coding for test leads in earth resistance measurement applications, ensuring clear assignment to the corresponding terminals on the measuring instruments.

Applications
The test lead is used in the field of electrical engineering and safety technology, particularly for testing earthing systems in buildings, industrial plants or outdoors. It is suitable for measurements carried out as part of inspections according to applicable standards requiring precise determination of earth resistance. The length of 50 metres allows measurements over medium distances, while the drum facilitates handling and storage. Use in combination with earth electrodes and other test accessories enables 3- or 4-wire measurements.

Functions and Equipment in Detail
The cable is mounted on a drum that provides a stable handle, allowing the drum to be carried and rotated safely. This facilitates unwinding and rewinding the cable on site. The red colour is standardised and serves to clearly identify the corresponding connection points on earth resistance measuring instruments. The drum is designed to neatly accommodate the cable and prevent it from tangling.

Technology Explained Simply
The test lead serves as a connecting element between the earth resistance measuring instrument and the point to be measured or the earth rod. In 3- or 4-wire measurements, the cable is laid over a specific distance to determine the resistance of the earth connection. A length of 50 metres is sufficient for many standard applications. The drum with handle ensures compact and portable storage. The red colour is part of a standardised colour code used in measurement technology to avoid wiring errors.

Compatibility and Accessories
The accessory is compatible with all earth resistance measuring instruments from Chauvin Arnoux, regardless of the connector type used, as the instruments are equipped with adapters featuring 4 mm Ø banana socket or cable lug connection. It can be used in combination with other accessories such as earth electrodes, additional test leads in other colours (e.g. green, black) or adapters. Use within a complete earth resistance measurement set (e.g. 3-pole or 4-pole) is intended.

Mounting and Installation
Installation is carried out by simply unwinding the cable from the drum. The handle enables safe handling during unwinding. The cable is connected to the corresponding terminal on the measuring instrument, with the red colour indicating the matching terminal on the device. The other end of the cable is connected to the earth rod or the point to be measured. After measurement, the drum can be rewound, with the handle facilitating handling.

Advantages in Operation
The drum with handle enables easy and safe handling of the cable on site. The length of 50 metres is sufficient for many applications, avoiding the need to lay excessively long cables. The red colour ensures clear identification and reduces the risk of incorrect connections. Use in combination with other accessories allows flexible adaptation to different measurement tasks. The cable is designed for use in earth resistance measurement applications and supports accurate determination of earth resistance.