Kufotokozera Kwachidule:

Ma board ogawa a HDB-H amapezeka ndi katundu wokhazikika kapena msonkhano wogawanika wa poto. Amakhala ndi chitseko chachitsulo chosungunuka bwino chokhala ndi mtundu wa "slam". Mabodi onse amaperekedwa ndi mipiringidzo ya Neutral ndi Earth yomwe imayikidwa ndipo osalowererapo amapangidwa kuti azikulunga mozungulira chipangizo chomwe chikubwera kuti chitsimikizire kuti malo owonjezera a mawaya alipo kwa zipangizo zotuluka. Chipangizo chomwe chikubwera chiyenera kusankhidwa ndikuyikidwa ndi oyika. Ma plates apamwamba ndi apansi amachotsedwa ndipo amaphatikizanso zogogoda kuti zigwirizane ndi mizere yokhazikika. Msonkhano wa poto waphimbidwa kwathunthu ndipo mabasi ndi gawo limodzi lopangidwa, izi zimatsimikizira kuti palibe "malo otentha" omwe angachitike chifukwa palibe zolumikizira makina. Ma board adagwirizana ndiBSEN 60439-1 & 3.