Ubufakazi bokuqhuma kwe-Shenhai
Amaleveli okuvikela afaka ikhodi ye-IP elandelwa izinombolo ezimbili. Inombolo yokuqala kwesokunxele ikhombisa izinga lokuvikela uthuli, kuyilapho inombolo yesibili imelela izinga lokuvikela amanzi.
Ngezinye izikhathi, abathengi, ukufuna amanani aphansi noma ukungawaqondi ngokugcwele amazinga okuvikela, might choose explosion-proof motors with lower IP ratings than required. Ngokwesibonelo, when selecting an injini engaqhumi for applications such as driving a coal mill in a power plant, it is essential to use one with an IP54 rating, rather than settling for IP44 or even IP23 motors.