1.1.1 Equipment covered by this part
This part of GB 4943 is applicable to mains-powered or battery-powered information technology equipment, including electrical business equipment and associated equipment, with a RATED VOLTAGE not exceeding 600 V.
This part is also applicable to such information technology equipment:
- designed for use as telecommunication terminal equipment and TELECOMMUNICATION NETWORK infrastructure equipment, regardless of the source of power;
- designed and intended to be connected directly to, or used as infrastructure equipment in, a CABLE DISTRIBUTION SYSTEM, regardless of the source of power;
- designed to use the AC MAINS SUPPLY as a communication transmission medium (see Clause 6, Note 4 and 7.1, Note 4).
This part is also applicable to components and subassemblies intended for incorporation in information technology equipment. It is not expected that such components and subassemblies comply with every aspect of the part, provided that the complete information technology equipment, incorporating such components and subassemblies, does comply.
NOTE 1 Examples of aspects with which uninstalled components and subassemblies may not comply include the marking of the power rating and access to hazardous parts.
NOTE 2 This part may be applied to the electronic parts of equipment even if that equipment does not wholly fall within its Scope, such as large-scale air conditioning systems, fire detection systems and fire extinguishing systems. Different requirements may be necessary for some applications.
This part specifies requirements intended to reduce risks of fire, electric shock or injury for the OPERATOR and layman who may come into contact with the equipment and, where specifically stated, for a SERVICE PERSON.
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1.2.1 Equipment electrical ratings
1.2.1.1
RATED VOLTAGE
supply voltage (for a three-phase AC MAINS SUPPLY, the line-to-line voltage) as declared by the manufacturer
1.2.1.2
RATED VOLTAGE RANGE
supply voltage range as declared by the manufacturer, expressed by its lower and upper RATED VOLTAGES
1.2.1.3
RATED CURRENT
input current of the equipment as declared by the manufacturer
1.2.1.4
RATED FREQUENCY
supply frequency as declared by the manufacturer
1.2.1.5
RATED FREQUENCY RANGE
supply frequency range as declared by the manufacturer, expressed by its lower and upper RATED FREQUENCIES
1.2.2 Operating conditions
1.2.2.1
NORMAL LOAD
mode of operation, used for testing purposes, which represents as closely as possible the most severe conditions of normal use which can reasonably be expected
If the conditions of actual use can reasonably be expected to be more severe than the maximum load conditions recommended by the manufacturer, including RATED OPERATING TIME and RATED RESTING TIME, a mode of operation is used that represents these more severe conditions.
NOTE NORMA L LOAD conditions for some types of equipment are given in Annex L.
1.2.2.2
RATED OPERATING TIME
maximum operating time assigned to the equipment by the manufacturer
