UL 60947-1

Low-Voltage Switchgear and Controlgear – Part 1: General Rules

UL 60947-1

1.1 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:

– definitions;

– characteristics;

– information supplied with the equipment;

– normal service, mounting and transport conditions;

– constructional and performance requirements;

– verification of characteristics and performance.

1.1 Additions to 1.1:

This equipment is intended for installation in accordance with the National Electrical Code (NEC) for use in ordinary locations. Requirements based on the NEC are found in Annex dva of this document.” IEC 60947-2: Part 2: Circuit-breakers” does not apply in the USA. They are covered in UL 489 “Molded-case Circuit-breakers, Molded-case Switches and Circuit-breaker Enclosures”.” IEC 60947-3: Part 3: Switches, disconnectors, switch-disconnectors and fuse combination units” does not apply in the USA. They are covered in UL 98 “Enclosed and Dead-front Switches”.

1.1 Modification of 1.1:

In the USA, equipment operating at more than 600 V is considered as high voltage equipment with respect to the requirements in the National Electrical Code.

1.1 Addition to 1.1:

Enclosed industrial control equipment intended for use as service equipment shall comply with the applicable requirements in this standard and with UL 869A.