UL-913:2013 pdf free download – STANDARD FOR SAFETY Intrinsically Safe Apparatus and Associated Apparatus for Use in Class I, II, and II, Division 1, Hazardous (Classified) Locations.
a) For intrinsically safe apparatus:
1) An indication that the apparatus is intrinsically safe;
2) If investigated using the entity evaluation, the maximum input voltage, maximum input current, maximum internal capacitance, maximum internal inductance, and maximum input power;
3) If repair is possible, a warning label worded “Warning — Substitution of Components May Impair Intrinsic Safety;” and
4) A reference to accompanying literature, that provides special installation, maintenance, or operating instructions, If this information is not on the apparatus, it shall be included or referenced on the control drawing.
5) Where live maintenance is possible or when the intrinsically safe apparatus is supplied from multiple associated apparatus, one of the following markings shall be provided:
A) Where the manufacturer does not specify live maintenance procedures, the word “WARNING” and the following or the equivalent “To prevent ignition of flammable or combustible atmospheres, disconnect power before servicing.”
B) Where the manufacturer specifies and provides live maintenance procedures, the word WARNING” and the following or equivalent: “To prevent ignition of flammable or combustible atmospheres, read, understand, and adhere to the manufacturer’s live maintenance procedures.”
6) Apparatus or battery packs provided with external contacts for recharging the batteries shall be marked with the following, or equivalent: “CAUTION: To reduce the risk of explosion, recharge the batteries outside of the hazardous location.”
Exception: Apparatus or battery packs investigated and found acceptable for recharging in the hazardous location need not be provided with this marking. In this case, the battery charger shall be investigated and the marking shall specify the acceptable charger.
b) For Associated Apparatus:
1) If investigated using the entity evaluation, the maximum output voltage, maximum output current, maximum allowed capacitance, maximum allowed inductance, and maximum output power;
2) If repair is possible, a warning worded “Warning — Substitution of Components May Impair Intrinsic Safety;”
3) Any other necessary information, in particular, an indication of any other type of protection and its characteristics; and
4) A reference to accompanying literature, that provides special installation, maintenance, or operating instructions. If this information is not on the apparatus, it shall be included or referenced on the control drawing.
5) An indication that the associated apparatus provides intrinsically safe circuits.
6) The maximum rms ac or dc Um that can be applied to terminals of non-intrinsically safe apparatus or associated apparatus.
10.3 Terminals, terminal boxes, and plugs and receptacles for connection to intrinsically safe circuits shall be clearly identified and clearly distinguishable. If color only is used to comply with this requirement, the color shall be light blue.
10.4 Battery-powered apparatus shall be marked as follows:
a) A caution statement to indicate the type, size, and voltage of batteries to be used, or indicate the specific battery by manufacturer and model number or equivalent to be used.
b) In addition, for battery assemblies with two or more replaceable batteries, the apparatus shall be marked with the following warning or equivalent.