IEC 60950-22-2005 pdf – Information technology equipment – Safety – Part 22: Equipment to be installed outdoors

IEC 60950-22-2005 pdf – Information technology equipment – Safety – Part 22: Equipment to be installed outdoors.
1 Scope 1.1 Equipment covered This part of IEC 60950 applies to information technology equipment intended to be installed in an OUTDOOR LOCATION . The requirements for OUTDOOR EQUIPMENT also apply, where relevant, to empty OUTDOOR ENCLOSURES supplied for housing information technology equipment to be installed in an OUTDOOR LOCATION . 1.2 Additional requirements Each installation may have particular requirements. Some examples are given in 4.2. In addition, requirements for protection of the OUTDOOR EQUIPMENT against the effects of direct lightning strikes are not covered by the standard. For information on this subject, see IEC 61 024-1 . 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60068-2-1 1 :1 981 , Environmental testing – Part 2: Tests. Test Ka: Salt mist IEC 60364 (all parts), Electrical installations of buildings IEC 60364-4-43:2001 , Electrical installations of buildings – Part 4-43: Protection for safety – Protection against overcurrent IEC 60529, Degrees of protection provided by enclosures (IP Code) IEC 60950-1 :2005, Information technology equipment – Safety – Part 1: General requirements IEC 61643 (all parts), Low-voltage surge protective devices ISO 1 78, Plastics – Determination of flexural properties ISO 1 79 (all parts), Plastics – Determination of Charpy impact strength ISO 1 80, Plastics – Determination of Izod impact strength ISO 527 (all parts), Plastics – Determination of tensile properties
ISO 3231 , Paints and varnishes – Determination of resistance to humid atmospheres containing sulfur dioxide ISO 4628-3, Paints and varnishes – Evaluation of degradation of coatings – Designation of quantity and size of defects, and of intensity of uniform changes in appearance – Part 3: Assessment of degree of rusting ISO 4892-1 , Plastics – Methods of exposure to laboratory light sources – General guidance ISO 4892-2, Plastics – Methods of exposure to laboratory light sources – Xenon-arc sources ISO 4892-4, Plastics – Methods of exposure to laboratory light sources – Open-flame carbon- arc lamps ISO 8256, Plastics – Determination of tensile-impact strength ISO 1 81 73:2005 Non-destructive testing – General terms and definitions 3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 60950-1 and the following apply. 3.1 OUTDOOR LOCATION location for equipment where protection from the weather and other outdoor influences provided by a building or other structure is limited or non-existent 3.2 OUTDOOR EQUIPMENT equipment specified by the manufacturer to be installed where exposed wholly or partly to the conditions in an OUTDOOR LOCATION NOTE TRANSPORTABLE EQUIPMENT , for example, a laptop or notebook computer, or a telephone, is not OUTDOOR EQUIPMENT unless specified by the manufacturer for continuous use in an OUTDOOR LOCATION . 3.3 OUTDOOR ENCLOSURE part of OUTDOOR EQUIPMENT that is exposed to the adverse conditions in an OUTDOOR LOCATION and that is intended to protect the interior of the equipment from those conditions NOTE 1 An OUTDOOR ENCLOSURE can also perform the functions of one or more of the following: a FIRE ENCLOSURE ; an ELECTRICAL ENCLOSURE ; a MECHANICAL ENCLOSURE . NOTE 2 A separate cabinet or housing into which the equipment is placed can provide the function of an OUTDOOR ENCLOSURE
4.2 AC mains supply Mains-operated OUTDOOR EQUIPMENT shall be suitable for the highest Overvoltage Category expected in the installation location. Consideration shall be given to the following: – the prospective fault current of the supply to OUTDOOR EQUIPMENT can be higher than for indoor equipment, see IEC 60364-4-43; and – the Overvoltage Category for OUTDOOR EQUIPMENT can be higher than for indoor equipment. Equipment that is part of the building installation, or that may be subject to transient overvoltages exceeding those for Overvoltage Category II, shall be designed for Overvoltage Category III or IV, unless additional protection is to be provided internal or external to the equipment. In this case, the installation instructions shall state the need for such additional protection. It is permitted to include components within OUTDOOR EQUIPMENT that reduce the Overvoltage Category or the prospective fault current. Components used to reduce the Overvoltage Category shall comply with the requirements of IEC 61643-series. NOTE 1 Annex G of IEC 60950-1 only provides a method of determining minimum CLEARANCES for transient voltages corresponding to Overvoltage Categories III and IV. Other parts of the insulation system, for example requirements for solid insulation and for electric strength testing, must be capable of withstanding the higher transient voltages (see IEC 60664-1 ). NOTE 2 The Overvoltage Category of OUTDOOR EQUIPMENT is normally considered to be one of the following: – if powered via the normal building installation wiring, Overvoltage Category II; – if powered directly from the mains distribution system, Overvoltage Category III; – if at, or in the proximity of, the origin of the electrical installation, Overvoltage Category IV.