CAN/CSA-C282-05

Update No. 2 was published as notification that this is now a National Standard of Canada

Preface

This is the fourth edition of CSA C282, Emergency electrical power supply for buildings.

It supersedes the previous editions published in 2000, 1989, and 1977.

The main changes in this edition are as follows:

(a) general:

(i) revisions to the Scope to reference the National Building Code of Canada (NBC) (see Clause 1.1);

(ii) clarification of the types of systems not covered by this Standard (see Clause 1.2);

(iii) addition of a terminology clause (see Clause 1.3);

(iv) removal of references to CSA Z32;

(v) new and revised definitions (see Clause 3); and

(vi) replacement of Annexes B, D, and E by Annex B, to which additional material has been added;

(b) emergency electrical power supply plant:

(i) for harmonization with the NBC, all components up to and including the automatic transfer switch(es) are required to have a fire resistance rating of not less than 1 h (see Clause 5.2);

(ii) clarification of circuit integrity requirements for power and control wiring interconnecting emergency equipment installed outside the generator service room (see Clause 5.3);

(iii) clarification of the full-load requirement (see Clause 6.1.1.2);

(iv) addition of a labelling requirement for the full-load rating for the design location (see Clause 6.1.1.4); and

(v) clarification of the location of generator sets and auxiliary equipment (see Clause 6.2);

(c) power supply performance:

(i) clarification of the performance requirements for a generator set of an emergency supply (see Clause 6.4);

(ii) clarification of the layout of generator sets and their controls (see Clause 6.5), including the requirement for more than one emergency generator set (see Clauses 6.5.2 and B.6);

(iii) clarification of the ventilation requirements (see Clause 6.7.1);

(iv) clarification of the service room temperature requirements and the requirements for equipment and components located in the service room (see Clauses 6.8.1, 6.9.1, and B.7);

(v) clarification of control sequence requirements to address delayed emergency and non-emergency loads (see Clause 6.12); and

(vi) clarification of the pre-transfer elevator control sequence requirements (see Clause 6.14);

(d) generator set:

(i) clarification of the exhaust system requirements (see Clauses 7.2.1 and 7.2.2);

(ii) waiver of the requirement for on-site fuel storage for natural-gas-fuelled emergency generators, at the discretion of the authority having jurisdiction, if reliability of the fuel supply can be demonstrated (see Clauses 7.3.2 and 7.3.3);

(iii) clarification of the requirements for the use of natural gas as a fuel source for emergency generators (see Clause 7.3.6);

(iv) clarification of the on-site fuel supply requirements (see Clauses 7.3.8 to 7.3.10); and

(v) clarification of the control panel requirements (see Clauses 7.4.1(d) and 7.4.2);

(e) generator exciters and voltage regulators:

(i) removal of the voltage dip requirements; and

(ii) clarification of the overcurrent devices requirements (see Clause 8.7.1); and

(f) operation and maintenance program:

(i) addition of a data observation requirement for the operational test (see Clause 10.2.3(e));

(ii) clarification of the requirement for shutdown tests (see Clause 10.5) and revision of Table 1 to include additional safety indications; and

(iii) strengthening of inspection, test, and maintenance requirements through revisions to Tables 2 to 6.

This Standard was prepared by the Technical Committee on Emergency Electrical Power Supply for Buildings, under the jurisdiction of the Strategic Steering Committee on Fire Safety and Fuel-Burning Equipment, and has been formally approved by the Technical Committee. It will be submitted to the Standards Council of Canada for approval as a National Standard of Canada.

Scope

1.1

This Standard applies to the design, installation, operation, maintenance, and testing of emergency generators and associated equipment for providing an emergency power supply to electrical loads in buildings and facilities when the normal power supply fails and an emergency power supply is required by the National Building Code of Canada (NBC).

Notes:

(1) For guidelines on emergency electrical power supply for life-support equipment, see Annex A.

(2) In this Standard, the term building also includes facilities.

1.2

This Standard does not cover

(a) any emergency power supply provided from storage batteries or other sources of uninterrupted power supply (UPS);

(b) application of an emergency power supply; and

(c) design and construction of unit equipment for emergency lighting that complies with CSA C22.2 No. 141.

1.3

In CSA Standards, 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; may is used to express an option or that which is permissible within the limits of the standard; and can is used to express possibility or capability. 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.

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