Preface:

This is the first edition of CSA C22.2 No. 304, Enclosed and dead-front switches for photovoltaic applications, one of a series of Standards issued by CSA Group under Part II of the Canadian Electrical Code.

This Standard is intended to be used in conjunction with CAN/CSA-C22.2 No. 4, Enclosed and dead-front switches. The material in this Standard supplements CAN/CSA-C22.2 No. 4 by providing additional requirements for switches that are intended for use in photovoltaic applications.

For general information on the Standards of the Canadian Electrical Code, Part II, see the Preface of CAN/CSA-C22.2 No. 0.

This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group.

Scope:

1.1
This Standard applies to enclosed and dead-front switches for use in photovoltaic (PV) systems rated 1500 V dc maximum, 1200 A maximum.

1.2
Fusible switches for photovoltaic applications are intended for use with photovoltaic fuses covered by CSA C22.2 No. 248.19.

1.3
General requirements applicable to this Standard are given in the latest edition of CAN/CSA-C22.2 No. 0.

1.4
This Standard is intended to be used in conjunction with CAN/CSA-C22.2 No. 4, which specifies additional mandatory requirements.

1.5
In this Standard, "shall" is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; "should" is used to express a recommendation or that which is advised but not required; and "may" is used to express an option or that which is permissible within the limits of the standard. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.