Kufotokozera Kwachidule:

Mikhalidwe Yabwinobwino Yogwirira Ntchito
Kukwera 1000- 3000m;
Kutentha kwa chilengedwe sikokwera kuposa +40″C, osati kotsika kuposa -30C (dera lozizira komanso lokwera silikotsika kuposa -40C);
Mphepo imakanikiza osati kupitirira 700Pa; (mofanana ndi liwiro la mphepo 34ms/s);
Mphamvu ya chivomerezi si yoposa madigiri 8;
Kukhuthala kwa ayezi sikoposa 10 mm;
Kukhazikitsa malowo sikuyenera kuphulika mosavuta chifukwa cha zinthu zoopsa, kuwonongeka kwa mankhwala ndi kugwedezeka kwamphamvu;
Cholekanitsa pillar grade dirty mu son: Common type ndi 0 class, kuteteza dirty type ngati II class.
Chosinthira ichi chosiyanitsa chimatsatiridwa ndi "GB 1985-89 yosinthana kuthamanga kwambiri imateteza chosinthira".
IEC129(1984> (kusinthana kumateteza switch ndi kulumikiza chozungulira cha switch) ndi zida za IEC694 (1980) "zosinthira zamagetsi zamagetsi zomwe zimawongolera zida kuti zilamulire ndi chinthucho" pazopempha zosiyanasiyana.