This PDF includes GI #2 and #3.

Note:

In order to maintain a consistent clause number/subject matter relationship throughout this Standard, some numbers have been purposely omitted.

1. Scope

1.1

This Standard covers the construction and test of moulded case circuit breakers (hereafter referred to for convenience as breakers) rated at 6000 A or less and 600 V or less, intended for the protection of services, feeders, and branch circuits in accordance with the Canadian Electrical Code, Part I.

1.2

This Standard does not apply to so-called moulded case switches that do not incorporate automatic overcurrent tripping devices.

1.3

Clause 7 of this Standard applies to adjustable type circuit breakers and supplements requirements covered in Clauses 1 to 6.

1.4

Clause 8 of this Standard applies to accessories that mount in or on a breaker to provide an additional operating or indicating function.

1.5

Clause 9 of this Standard applies to fused circuit breakers and high-fault protectors and supplements the other requirements of this Standard.

1.6

Clause 10 of this Standard applies to instantaneous-trip circuit breakers and supplements the other requirements of this Stan dard.