I-Intrinsically Safe Safe Explosion-Proof Mark

Ubufakazi bokuqhuma obuphephile ngaphakathi bumele isigaba esithile ngaphakathi kwezindlela zokuvikela ukuqhuma, ngokusemthethweni ibizwa ngokuthi 'Iphephile Ngaphakathi,’ futhi iboniswa ngophawu “i.”

Lolu hlobo luhlukaniswe ngamaleveli amathathu ahlukene: ia, ib, kanye ic, ngayinye ibonisa izinga elihlukile lokuphepha kwangaphakathi.