It is recommended to equip the wiring terminals of circuit breakers for rural lighting electrical ready boards in Africa with insulation sheaths as standard, which is a mandatory requirement for formal supply scenarios such as Eskom projects. The local operation and maintenance level is limited, and there is a large temperature difference between day and night, which easily leads to condensation. With the invasion of dust and insects, the risk of exposed terminals is significantly increased. The insulation sheath is made of flame-retardant insulation material, and its primary function is to prevent personnel and livestock from accidentally touching live terminals during unpacking and maintenance, thereby reducing electric shock accidents; Simultaneously isolate dust and condensation, avoid phase to phase creepage and short circuit ignition, reduce power outages and repair reports, and adapt to the harsh working conditions of high pollution and high humidity in rural Africa

Boundary needs to be distinguished: If the circuit breaker in the electrical Ready Board Box comes with an integrated terminal protective cover from the original factory, and the protection meets IP2X and the live metal cannot be directly touched by fingers, no additional independent protective sheath can be added; However, most of the terminals of ordinary small circuit breakers are exposed and must be equipped with snap on insulation shields, rather than relying solely on wire insulation. The protective sheath does not affect temperature measurement, fastening and maintenance, reserves an operating window, and does not obstruct the phase sequence identification.

From the perspective of project acceptance, SANS and Eskom specifications have direct contact protection requirements for touchable exposed live parts. The lack of protective sheaths will determine defects and cannot pass on-site acceptance. It cannot be simply omitted for cost reduction purposes. This accessory can significantly improve the long-term reliability of the equipment and reduce the after-sales failure rate. The sheath shall be temperature resistant, aging resistant, flame retardant, and suitable for the circuit breaker model. It shall be firmly installed to avoid loosening and falling off.