Umehluko Phakathi Kwezibani Zobufakazi Bokuqhuma kanye Nezibani Ezivamile

Izinto zokukhanyisa ezingaqhumi ziyisigaba sezibani eziklanywe ngezici zokuvikela ukuqhuma, imakwe nge “Ex” uphawu. Lezi zakhiwo zinezindawo ezithile zokuvala uphawu kanye nezinyathelo ezengeziwe zokuzivikela esakhiweni sazo, njengokugunyazwa ngamazinga kazwelonke. Ngokungafani nezibani ezingaqhumi, banamathela ezimfuneko eziningana eziyingqayizivele:

1. Isigaba sokuvikela ukuqhuma, Ibanga, and Temperature Group: These are defined by national standards.

2. Types of Explosion-proof Protection:

There are five main types – angashi, ukwanda kokuphepha, ukucindezela okuhle, okungeyona inhlansi, and dust explosion-proof. They can also be a combination of these types or be of a composite or special kind.

3. Electric Shock Protection:

Classified into three categories – I, II, kanye III. The purpose is to prevent electric shocks from accessible parts or conductors at different potentials, which might ignite eziqhumayo izingxube.

Thayipha I: Based on basic insulation, conductive parts that are normally non-live and accessible are connected to a protective earth conductor in the fixed wiring.

Uhlobo II: Uses double or reinforced insulation as safety measures, without ukubeka phansi.

Uhlobo III: Operates on a safe voltage not exceeding 50V and doesn’t produce higher voltages.

Uhlobo 0: Relies solely on basic insulation for protection.

Most explosion-proof lighting fixtures fall under Type I, with a few being Type II or III, such as all-plastic explosion-proof lights or explosion-proof flashlights.

4. I-Enclosure Protection Level:

Various protection methods for the enclosure are used to prevent the ingress of dust, solid objects, namanzi, which could lead to sparking, short-circuiting, or compromising the electrical insulation. Characterized by “IP” followed by two digits, the first digit represents protection against contact, okuqinile, or dust (kusukela 0-6), neyesibili ngokumelene namanzi (kusukela 0-8). As sealed fixtures, explosion-proof lights have at least a level 4 dust protection.

5. Material of Mounting Surface:

Indoor explosion-proof lights might be mounted on ordinary combustible surfaces like wooden walls and ceilings. These surfaces must not exceed a safe izinga lokushisa due to the light fixtures.

Based on whether they can be mounted directly on ordinary combustible materials, they are categorized into two types.

Summary – “How are explosion-proof lights different from regular lights?”: Regular lights are used in non-hazardous locations without ezivuthayo amagesi noma uthuli. Unlike explosion-proof lights, they lack explosion-proof grades and types. Regular lights mainly serve illumination purposes, while explosion-proof lights not only provide illumination but also offer explosion protection, ensuring the safety of personnel and preventing property damage.