1. Explosion-proof lamp shall be provided a permanent and eye-catching logo “Ex” with embossed or concave pattern。 A prominent place in the shall to be provided nameplate. Warning signs should be clearly visible, set in propriety place. Such as “off the power after opening the lid” warning signs shall be install at openings nearby.
2 because of explosive dangerous location is often associated with the presence of corrosive gases, so the symbol of explosion-proof lamp shell shall be with thickness not less than 1mm (small lamps and lanterns thickness not less than 0.5mm) bronze, brass, stainless steel or corrosion resistance than other material made。 Should also be reliable fixed, not easy to fade or fall off.
3,The methods of test marker durability is: after using water-soaked cloth graze 15s to be dry, and then using gasoline soaked cloth graze 15s, visual inspection, signs should be clear, not falling.
4. Content of nameplate signs should include:
A) explosive proof mark.
B) basic signs: including product name, model number, manufacturer name, registered trademark, manufactured date.
C) performance safety signs include: rated voltage, current, nominal frequency, light source power , quantity, allowable ambient temperature (the range is -20 ~ +40 ℃ not standard), the specific application of environmental labels (such as to apply only one kind of explosive gas mixture of products, shall be marked with the name and molecular formula of combustible gas), luminaire classification symbol (such as “digital) and so on.
D) explosion-proof certificate number, that the product has the explosion-proof test stations officially tested by. Some products are explosion-proof certificate No. with the “X” symbol, which shows that this kind of product can only be used in some special security conditions of use, should be clearly marked to indicate the conditions prescribed in the lamp shell or product specification. Special security conditions there are many types, users see the proof certificate number after the “x” symbol, they should pay attention to understand the kinds of products to find exactly what special security conditions, in order to properly operate the installation process to avoid danger.
D) annotated. In addition to the mark, in order to ensure the correct installation details required, use and maintenance of detail required, shall be in the lighting, or the built-in ballast and lighting products provided with the manufacturer’s instructions are given. For example:
A allowable working position of explosion-proof lamp, explosion-proof lamps are only allowed to use some installed in a position or a certain angle range, this is because the position the change, the heat distribution explosion-proof lamps surface and the maximum surface temperature will change, the reason for the explosion-proof lamp position limits, the main the reason is that in order to control the maximum surface temperature, not to let the temperature over explosion-proof lamp itself marks, brings dangerous temperature. Therefore, the explosion-proof lamp installation position limit must be clear.