Kupereka chitetezo ku zoopsa zomwe zingachitike monga kukhudzana ndi anthu komanso nyengo yoipa, zozungulira zamagetsi ndi zida zofananira monga zoboola zamagetsi nthawi zambiri zimayikidwa mkati mwa mpanda.Koma popeza zina zimafuna kuti chitetezo chikhale chokwera kuposa china, si malo onse omwe amapangidwa mofanana.Kuti apereke chitsogozo pamiyezo yachitetezo ndi zomangamanga, bungwe la National Electrical Manufacturers Association lapereka malangizo omwe avomerezedwa m'makampani amagetsi monga de facto muyezo wazotsekera magetsi.
Pakati pamitundu yosiyanasiyana ya NEMA, mpanda wa NEMA 4 umagwiritsidwa ntchito pafupipafupi kuti atetezedwe ku zinthu, kuphatikiza nyengo yozizira komanso kupanga ayezi kunja kwa mpanda.NEMA 4 imapereka chitetezo chowonjezera, ndipo ndiye mpanda wa NEMA wopanda fumbi wotsika kwambiri.Kuphatikiza apo, imatha kuteteza kumadzi akuthwa komanso ngakhale madzi oyendetsedwa ndi payipi.Komabe, sizotsimikizira kuphulika, kotero sizoyenera kugwiritsidwa ntchito pazinthu zowopsa kwambiri.
Kuphatikiza apo, mpanda wa NEMA 4X wapangidwanso.Monga momwe zimaganiziridwa mosavuta, NEMA 4X ndi kagawo kakang'ono ka mlingo wa NEMA 4, kotero imapereka mlingo womwewo wa chitetezo ku nyengo yakunja, makamaka ku dothi, mvula, matalala ndi fumbi la mphepo.Zimaperekanso chitetezo chofanana ndi madzi oponyedwa.
Kusiyanitsa ndiko kuti NEMA 4X iyenera kupereka chitetezo chowonjezereka ku zowonongeka kuposa zomwe zimaperekedwa ndi NEMA 4. Chotsatira chake, mipanda yokhayo yopangidwa kuchokera ku zipangizo zosapanga dzimbiri, monga zitsulo zosapanga dzimbiri ndi aluminiyamu, zikhoza kuyeneretsedwa ku chiwerengero cha NEMA 4X.
Monga momwe zilili ndi zotsekera zambiri za NEMA, zosankha zingapo zitha kuwonjezeredwa, kuphatikiza mpweya wokakamiza komanso kuwongolera nyengo.
Nthawi yotumiza: Apr-18-2022