UL Standard for Safety Low-Voltage Switchgear and Controlgear – Part 1: General rules
|Publication Date:||31 July 2013|
Scope and object
This standard applies, when required by the relevant product standard, to switchgear and controlgear hereinafter referred to as ″equipment″ and intended to be connected to circuits, the rated voltage of which does not exceed 1 000 V a.c. or 1 500 V d.c.
It does not apply to low-voltage switchgear and controlgear assemblies which are dealt with in IEC 60439.
NOTE - In certain clauses or subclauses of this standard, the equipment covered by this standard is also referred to as ″device″, to be consistent with the text of such clauses or subclauses.
The object of this standard is to state those general rules and requirements which are common to low-voltage equipment as defined in 1.1, including for example:
- information supplied with the equipment;
- normal service, mounting and transport conditions;
- constructional and performance requirements;
- verification of characteristics and performance.
Digital inputs and/or digital outputs contained in switchgear and controlgear, and intended to be compatible with programmable controllers (PLCs) are covered by Annex S.