No ka hoʻonohonoho paʻa ʻana o nā ʻōnaehana hoʻoili a me ka hāʻawi ʻana, nā tunnels a me nā pipeline a me nā manawa ʻē aʻe.
He kūpono nā kaula SANS 1507-4 PVC-insulated no nā noi kahi i hopohopo ʻole ai nā mana mechanical waho.
Ke kanu pololei ʻana i nā kūlana lepo hoʻokahe manuahi no nā hoʻonohonoho paʻa i loko a me waho.
ʻO ka pale kaua SWA a me ka ʻaʻahu kūpaʻa wai paʻa e kūpono ia no ka hoʻohana ʻana i loko a i waho o nā hale a i ʻole no ke kanu pololei ʻana i ka lepo.