◆ Ƙananan hasara, ƙananan farashin aiki, da tasirin ceton makamashi a bayyane;
◆ Mai hana wuta, mai hana gobara, fashewar fashewa da rashin gurɓatawa;
◆ Kyakkyawan aikin tabbatar da danshi da ƙarfin haɓaka zafi mai ƙarfi;
◆ Ƙananan fitarwa na yanki, ƙaramar amo da rashin kulawa;
◆ Babban ƙarfin injin, ƙarfin gajeriyar juriya mai ƙarfi da tsawon rayuwar sabis;
Sharuɗɗan amfani waɗanda suka cika waɗannan buƙatu sune sharuɗɗan amfani na yau da kullun:
a.Tsayin da ke sama da matakin teku bai kamata ya wuce mita 1000 ba.
b.Yanayin zafin jiki + 40°C matsakaicin zafin rana + 30°C matsakaicin zazzabi na shekara +20°C mafi ƙarancin zafin jiki -30°C (na masu canjin waje) mafi ƙarancin zafin jiki -5°C (na masu canji na cikin gida).
C. Siffar kalaman wutar lantarki na wutar lantarki yayi kama da sine.
d.Alamar ƙarfin wutar lantarki mai nau'i-nau'i da yawa, ƙarfin wutar lantarki da aka haɗa da na'ura mai ɗaukar hoto ya kamata ya zama kusan daidaici.