Before installation, **shockproof floodlights** must be carefully checked against the nameplate and product specifications. This includes verifying the lamp type, category, protection level, and group; the degree of dust and water resistance; and the mounting method along with fastener requirements. The luminaire should be securely fastened, with bolts not being replaced arbitrarily and spring washers remaining intact. The dust-proof and waterproof seals must be in place as originally installed. When cables enter the enclosure, they should fit snugly with the sealing gasket. The cable end should be smooth and round, with no surface imperfections such as roughness or cuts. Extra cable entries must be sealed according to the explosion-proof type, and the compression nut should be tightened properly to ensure a secure seal.
In routine maintenance, several important points need attention. **Earthquake-resistant floodlights** and their covers should ideally cut off power automatically before opening, but due to the complexity of interlocking systems, this is rarely implemented. Most lamps only have warning labels like “No Live-On†on the housing. Even after power is turned off, the bulb’s surface remains hot, which can still pose an ignition risk if the cover is opened too soon—especially in flameproof designs. Therefore, for **shockproof floodlights** that allow quick access to the cover, this safety consideration must not be overlooked.
When replacing a lamp or tube, take care to avoid damaging it. After cleaning the surface, apply phosphatizing paste or 204-1 anti-rust oil, but never paint over it. Ensure there is no rust present; if minor rust appears, it should be cleaned thoroughly without causing pitting. The dust and water seals must remain undamaged, as this is crucial for increased safety lighting. If the seal is severely damaged, replace it with one of the same size and material, and consider replacing the entire light if necessary. During maintenance, always check the integrity of the lampshade and replace it immediately if broken.
Portable floodlights are typically divided into two types: those powered by the grid and those with self-contained power sources. For grid-powered lamps, rubber-sleeved cables must be used between the explosion-proof junction boxes or plugs and the floodlight itself. Grounding or neutral connections should be within the same sheath, and the cable should meet the minimum allowable cross-sectional area—typically 25 mm² YC or YCW heavy-duty rubber cables. A critical point to emphasize here is that portable lighting cables must not have any intermediate joints. An incident once occurred during a night repair of an ethylene pump, where a temporary explosion-proof lamp (rated dIICT4) was used. The fitter noticed a gas leak from the pump and tried to inspect it closely. Unfortunately, the exposed wire core of the cable, which had been dragged across the ground and damaged, came into contact with the steel channel base, igniting the flammable gas mixture. Although the lamp passed its explosion-proof test, the accident was caused by a faulty cable with a connector 15 meters away from the lamp, wrapped in insulating tape. This incident revealed significant gaps in our explosion-proof safety protocols. Following the accident, we conducted a full inspection of all portable lamps and their cables to eliminate similar risks. It serves as a powerful reminder that in explosion-proof electrical safety management, we must never rely on luck. Strict compliance with regulations is essential to prevent such incidents.
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