For the special environment of high temperature, strong ultraviolet radiation, and large temperature difference between day and night in rural Africa, synthetic silicone rubber is the preferred material for the insulation sheath of electrical ready boards.
Silicone rubber is currently the most suitable material for such harsh outdoor environments in terms of comprehensive performance, with specific advantages reflected in the following aspects:
Excellent high and low temperature resistance: In rural areas of Africa, extreme daytime temperatures can reach over 45 ℃, and the electrical Ready Board Box will further heat up under sunlight. Silicone rubber can operate stably for a long time in the temperature range of -60 ℃ to+200 ℃ or even 380 ℃, without softening or deformation due to high temperatures, and without brittle cracking at low temperatures. In contrast, the maximum continuous use temperature of ordinary PVC materials is usually only around 60 ℃, which is difficult to meet the requirements of high temperature environments.
Excellent aging resistance and UV resistance: Silicone rubber material itself has excellent UV resistance and hydrophobicity, which can withstand direct sunlight for a long time without powdering, cracking or significant performance degradation. The outdoor service life of high-quality silicone rubber sheath can reach 50 years, especially suitable for rural areas in Africa that lack frequent maintenance conditions.
Reliable electrical and mechanical performance: The insulation strength of silicone rubber sheath can usually reach 20kV/mm or more, with high volume resistivity, which can effectively prevent short circuit faults caused by small animals climbing or foreign objects overlapping. At the same time, its high flexibility and tear resistance enable it to tightly fit different shaped terminal blocks during installation, and it adopts a snap on structure for easy disassembly and use during maintenance.
In summary, synthetic silicone rubber has the advantages of high temperature resistance, aging resistance, high insulation, and long service life, making it an ideal material choice for the insulation sheath of rural lighting electrical ready boards in Africa. If conditions permit, a silicone rubber sheath with thermal color change warning function can also be considered to visually indicate overheating faults.