1 Scope

1.1    
This standard applies to explosion-proof enclosures for electrical equipment suitable for use in Class I, Division 1, Groups A, B, C, and D hazardous locations as defined by Canadian Electrical Code, Part I and the requirements of CSA CAN3-M421.  It applies to explosion-proof enclosures and parts of explosion-proof enclosures constructed of metallic and non-metallic materials.

1.2
Other Standards for hazardous location equipment covering specific types of equipment take precedence over this Standard.

1.3
The standard atmospheric conditions (relating to the explosion characteristics of the atmosphere) under which it may be assumed that equipment can be operated are:

a)       temperature –50 °C to +60 °C;
b)       pressure 80 kPa to 110 kPa; and
c)       air with normal oxygen content, typically 21 % by volume.

Note: Although the standard atmospheric conditions above give a temperature range for the atmosphere of  50 °C to +60 °C, the normal ambient temperature range for the equipment is  50 °C to +40 °C, unless otherwise specified and marked.

1 Scope

1.1

This Standard applies to decorative lighting strings, decorative lighting outfits, pre-lit trees, and accessories, intended for seasonal or commercial use connected to circuits of 120 V nominal or less by means of an attachment plug, and designed to be used in accordance with the rules of the Canadian Electrical Code, Part I, in non-hazardous locations.

1.2

These requirements cover electrically-assembled

a) series or series-parallel connected lighting strings;

b) parallel connected lighting strings;

c) decorative outfits;

d) controllers and flashers;

e) motor operated tree stands;

f) flexible light cable systems (rope lights) covered in Annex D

g) string lights for year round use covered in Annex G

1.3

These requirements additionally cover ornaments, which are provided with an adapter for connection to a push-in lampholder and are intended to replace a push-in lamp in a series-connected decorative-lighting string.

1.4

These requirements do not cover

a) permanently connected products;

b) portable luminaries;

c) cord sets, power supply cords, and cord-connected, multiple receptacle extension boxes;

d) fibre-optic devices, if not used in conjunction with decorative lighting; and

e) strings employing candelabra lampholders of the bayonet type.

1.5

Decorative lighting products not incorporating lighting strings are covered by the requirements of CSA C22.2 No. 250.4.

1.6

The values given in SI units are the units of record for the purposes of this Standard. The values given in parentheses are for information and comparison only.

1.7

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.

This part of IEC 62368 is applicable to the safety of electrical and electronic equipment within the field of audio, video, information and communication technology, and business and office machines with a rated voltage not exceeding 600 V. This document does not include requirements for performance or functional characteristics of equipment.