Shenhai Kuphulika-Umboni
Pansi pa zitsogozo zokhazikitsidwa ndi miyezo yoyika zida zamagetsi zosaphulika, monga GB3836.15, magwero amagetsi a zida zotere amatha kugwiritsa ntchito TN, TT, ndi machitidwe a IT. Machitidwewa ayenera kutsatira mfundo zonse za dziko, kuphatikiza zofunikira zowonjezera mphamvu zowonjezera zomwe zafotokozedwa mu GB3836.15 ndi GB12476.2, potsatira kutsatira njira zodzitetezera.
Tengani mphamvu ya TN, Mwachitsanzo, makamaka mtundu wa TN-S, zomwe zimaphatikizapo kusalowerera ndale (N) ndi chitetezo (PE) makokondakita. M'malo owopsa, okonda awa sayenera kuphatikizidwa kapena kulumikizidwa palimodzi. Pakusintha kulikonse kuchokera ku TN-C kupita ku mitundu ya TN-S, woyendetsa chitetezo ayenera kugwirizanitsidwa ndi dongosolo logwirizanitsa equipotential m'malo omwe si owopsa. Komanso, m'malo owopsa, Kuyang'anira bwino kutayikira pakati pa mzere wosalowerera ndale ndi PE chitetezo conductor ndikofunikira.