Metal parts not current-carrying when in use, such as machine frames and casings, appliances, fittings and accessories, must be earthed if they are not already so mounted as to be in effective metallic contact with the hull.
Kovinski deli, ki med uporabo ne prenašajo toka, kakor so strojni okviri in ohišja, naprave, armature in pripomočki, morajo biti ozemljeni, če niso že nameščeni tako, da imajo učinkovit kovinski stik s trupom.