Main Categories

1.1

This Standard describes the methods for determining the level of depressurization and solutions to mitigate risk arising from depressurization.

1.2

This Standard applies to all existing single-family dwelling units contained in detached, semi-detached, and row houses equipped with an exhaust device, which have

a) a combustion device within the house; or

b) an attached garage.

1.3

This Standard does not provide depressurization level assessment methods or solutions for

a) the infiltration of soil gas such as radon;

b) the presence of volatile organic compound (VOC) emissions from building materials or contents;

c) the presence of mold in houses; or

d) the presence of pollutants from other sources, such as stored chemical products.

1.4

The requirements of this Standard are expressed in SI (metric) units.

1.5

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.

This standard covers escalator and moving walk driving machine brake and driving machine motor-controlled dynamic braking systems in accordance with ASME A17.1/CSA B44 Safety Code for Elevators and Escalators. 

Notes: For additional test procedures related to braking systems not required as part of this standard please see Annex A.

1.1 Scope

1.1.1 Equipment included in scope

This part of IEC 61010 specifies general safety requirements for the following types of electrical equipment and their accessories, wherever they are intended to be used.

a) Electrical test and measurement equipment

This is equipment which by electromagnetic means tests, measures, indicates or records one or more electrical or physical quantities, also non-measuring equipment such as signal generators, measurement standards, power supplies for laboratory use, transducers, transmitters, etc.

NOTE 1 This includes bench-top power supplies intended to aid a testing or measuring operation on another piece of equipment. Power supplies intended to power equipment are within the scope of IEC 61558 (see 1.1.2 h)).

This standard also applies to test equipment integrated into manufacturing processes and intended for testing manufactured devices.

NOTE 2 Manufacturing test equipment is likely to be installed adjacent to and interconnected with industrial machinery in this application.

b) Electrical industrial process-control equipment

This is equipment which controls one or more output quantities to specific values, with each value determined by manual setting, by local or remote programming, or by one or more input variables.

c) Electrical laboratory equipment

This is equipment which measures, indicates, monitors, inspects or analyses materials, or is used to prepare materials, and includes in vitro diagnostic (IVD) equipment.

This equipment may also be used in areas other than laboratories; examples include self-test IVD equipment to be used in the home and inspection equipment to be used to check people or material during transportation.

1.1.2 Equipment excluded from scope

This standard does not apply to equipment within the scope of:

a) IEC 60065 (Audio, video and similar electronic apparatus);
b) IEC 60204 (Safety of machinery - Electrical equipment of machines);
c) IEC 60335 (Household and similar electrical appliances);
d) IEC 60364 (Electrical installations of buildings);
e) IEC 60439 (Low-voltage switchgear and controlgear assemblies);
f) IEC 60601 (Medical electrical equipment);
g) IEC 60950 (Information technology equipment including electrical business equipment, except as specified in 1.1.3);
h) IEC 61558 (Power transformers, power supply units and similar);
i) IEC 61010-031 (Hand-held probe assemblies);
j) IEC 61243-3 (Live working - Voltage detectors - Part 3: Two-pole low-voltage type).

1.1.3 Computing equipment

This standard applies only to computers, processors, etc. which form part of equipment within the scope of this standard or are designed for use exclusively with the equipment.

NOTE Computing devices and similar equipment within the scope of IEC 60950 and conforming to its requirements are considered to be suitable for use with equipment within the scope of this standard. However, some of the requirements of IEC 60950for resistance to moisture and liquids are less stringent than those in this standard (see 5.4.4 second paragraph)).

1.1.4DV DR Addition of the following referencing the National Electrical Code and the Canadian Electrical Code:

This standard applies to equipment:

a) To be employed in accordance with ANSI/NFPA 70, National Electrical Code® (NEC);
b) Designed to comply with the general requirements of CAN/CSA C22.2 No. 0 and to be installed in accordance with the Canadian Electrical Code (CEC), Part I, CSA C22.1; or c) Both (a) and (b).

1.2 Object

1.2.1 Aspects included in scope

The purpose of the requirements of this standard is to ensure that HAZARDS to the OPERATOR and the surrounding area are reduced to a tolerable level.

Requirements for protection against particular types of HAZARD are given in Clauses 6 to 13, as follows:

a) electric shock or burn (see Clause 6);
b) mechanical HAZARDS (see Clauses 7 and 8);
c) spread of fire from the equipment (see Clause 9);
d) excessive temperature (see Clause 10);
e) effects of fluids and fluid pressure (see Clause 11);
f) effects of radiation, including lasers sources, and sonic and ultrasonic pressure (see Clause 12);
g) liberated gases, explosion and implosion (see Clause 13).

Requirements for protection against HAZARDS arising from REASONABLY FORESEEABLE MISUSE and ergonomic factors are specified in Clause 16.

RISK assessment for HAZARDS or environments not fully covered above is specified in Clause 17.

NOTE Attention is drawn to the existence of additional requirements regarding the health and safety of labour forces.

1.2.2 Aspects excluded from scope

This standard does not cover:

a) reliable function, performance, or other properties of the equipment not related to safety;
b) effectiveness of transport packaging;
c) EMC requirements (see the IEC 61326 series);
d) protective measures for explosive atmospheres (see the IEC 60079 series).

1.3 Verification

This standard also specifies methods of verifying that the equipment meets the requirements of this standard, through inspection, TYPE TESTS, ROUTINE TESTS, and RISK assessment.

1.4 Environmental conditions

1.4.1 Normal environmental conditions

This standard applies to equipment designed to be safe at least under the following conditions:

a) indoor use;
b) altitude up to 2 000 m;
c) temperature 5 °C to 40 °C;
d) maximum relative humidity 80 % for temperatures up to 31 °C decreasing linearly to 50 % relative humidity at 40 °C;
e) MAINS supply voltage fluctuations up to ±10 % of the nominal voltage;
f) TRANSIENT OVERVOLTAGES up to the levels of OVERVOLTAGE CATEGORY II;

NOTE 1 These levels of transient overvoltage are typical for equipment supplied from the building wiring.

g) TEMPORARY OVERVOLTAGES occurring on the MAINS supply.
h) applicable POLLUTION DEGREE of the intended environment (POLLUTION DEGREE 2 in most cases).

NOTE 2 Manufacturers may specify more restricted environmental conditions for operation; nevertheless the equipment must be safe within these normal environmental conditions.

1.4.2 Extended environmental conditions

This standard applies to equipment designed to be safe not only in the environmental conditions specified in 1.4.1, but also in any of the following conditions as RATED by the manufacturer of the equipment:

a) outdoor use;
b) altitude above 2 000 m;
c) ambient temperatures below 5 °C or above 40 °C;
d) relative humidity above the levels specified in 1.4.1;
e) MAINS supply voltage fluctuations exceeding ±10 % of the nominal voltage;
f) WET LOCATION;
g) TRANSIENT OVERVOLTAGES up to the levels of OVERVOLTAGE CATEGORY III or IV (see Annex K).

1 Scope

1.1 Vapour Compression Chilling Package Scope

This Standard applies to factory-designed and prefabricated vapour-compression Water-chilling and Water-Heating Packages that include one or more compressors. 

1.1.1 Included Vapour Compression Chilling Package Scope

The vapour-compression Water-chilling and Water-heating Packages include;

- Water-cooled, air-cooled, or evaporatively-cooled condensers
- Water-cooled heat recovery condensers
- Air-to-water heat pumps
- Water-to-water heat pumps with a capacity greater or equal to 40 kW

1.1.2   Excluded Vapour Compression Product Scope

The following products are excluded and not covered by this standard;
Water-to-water heat pumps with a Capacity less than 40 kW are covered by the latest edition of  CSAN/CSA standard 13256-2.

Air-to-water units designed exclusively to heat potable water as covered by the latest edition of C745

Water-chilling Packages are excluded when the condenser is actively adiabatically-cooled.

1.2 Absorption Chilling Package Scope

This Standard applies to water-cooled water chilling packages using lithium bromide refrigerant including the following:

1.2.1. Included water-cooled absorption chilling package Scope;

- water-cooled Single-effect steam,
- hot water operated Water-Chilling units,
- water-cooled Double-effect steam,
- water cooled hot water operated double effect water-chilling units,

double-effect direct-fired (natural gas, oil, LP gas) water-chilling/heating units.  .

1.2.2 Excluded water-cooled absorption chilling package Scope.

absorption chiller/heater units with air-cooled condenser,

applications employing heat pumping or exhaust gas firing

absorption chillers not using lithium bromide

1.3 Requirements

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.

IT Standard Adoptions: 9 New Editions – Batch 22-1

IT Standard Adoptions: 8 New Standards – Batch 22-1

IT Standard Adoptions: 13 Amendments – Batch 22-1

1.1  Overview

This Standard provides requirements and recommendations for the sharing of data collected at hydrometeorological monitoring stations, and considers the use of equipment and software for doing so. The Standard includes consideration, and any requirements or recommendations thereof, of the following elements:

• The maturity of related networks;
• Existing or planned data sharing policy and agreements;
• Reporting formats;
• Geospatial and temporal referencing;
• Data validation;
• Data transparency;
• Data transfer and interchange;
• Flagging of data, including estimated, aggregated, and unchecked data; and
• Intellectual property of shared data

This Standard does not cover the collection and presentation of hydrometeorological data.

1.2  Terminology

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 (nonmandatory) to define their application.

1.1  Aperçu

Cette norme énonce les exigences et les recommandations relatives au partage des données recueillies par les stations de surveillance hydrométéorologique et examine l’utilisation de matériel et de logiciels pour ce faire. La norme tient compte des éléments suivants, ainsi que de toute exigence ou recommandation à cet égard :

• La maturité des réseaux connexes;
• Les politiques et ententes de partage de données existantes ou prévues;
• Les formats de rapports;
• Le référencement géospatial et temporel;
• La validation des données;
• La transparence des données;
• Le transfert et l’échange de données;
• L’application d’indicateurs à des données, y compris en cas de données estimées, agrégées et non vérifiées; et
• La propriété intellectuelle des données partagées.

Cette norme ne traite pas de la collecte ni de la présentation des données hydrométéorologiques.

1.2  Terminologie

Dans cette norme, le terme « doit » indique une exigence, c’est‐à‐dire une prescription que l’utilisateur est obligé à respecter pour assurer la conformité à la norme; « devrait » indique une recommandation ou ce qu’il est conseillé mais non obligatoire de faire; et « peut » indique une possibilité ou ce qu’il est permis de faire.

Les notes qui accompagnent les articles ne comprennent pas de prescriptions ni de recommandations. Elles servent à séparer du texte les explications ou les renseignements qui ne font pas proprement partie de la norme.

Les notes au bas des figures et des tableaux font partie de ceux‐ci et peuvent être rédigées comme des prescriptions.

Les annexes sont qualifiées de normatives (obligatoires) ou d’informatives (facultatives) pour en préciser l’application.

1.1 Applicable equipment

This Standard applies to newly produced, direct-fired and indirect-fired construction heaters, hereinafter referred to as heaters or appliances, constructed entirely of new, unused parts and materials and primarily intended for temporary use in heating buildings or structures under construction, alteration, or repair. Products of combustion generated by direct-fired heaters are vented into the area being heated, whereas products of combustion generated by indirect-fired heaters are vented to the outdoors.

The requirements of this Standard cover heaters with rated inputs up to and including 10,000,000 BTU/h (2930 kW). 

This Standard applies to self-contained heaters with or without integral means for air circulation and may be intended for connection to ducts. If a heater is designed to be utilized with ductwork, the heater is to be tested with the ductwork recommended by the manufacturer or at the maximum static pressure specified by the manufacturer.

This Standard applies to direct ground thawing appliances for outdoor use where heat is directed into the ground.

This Standard applies to universal construction heaters (see Clause 3).

This Standard applies to heaters for use with the following fuel types:

a) natural gas;

b) propane gas in the vapor phase; and

        c) propane gas in the liquid phase when the heater:

incorporates an integral vaporizer that meets the requirements outlined in Clause 7, and meets all requirements for heaters for outdoor use outlined in Clause 5.14.

1.2 Non-applicable equipment

This Standard does not apply to heaters employing a flameless catalytic combustion process.

This Standard does not apply to heaters for use with liquid phase fuel gases, except when the heater is for use with liquid propane and incorporates an integral vaporizer as outlined under applicable fuel types in Clause 1.1.

1.3 Accessories

All accessories intended for use with appliances certified to this Standard are to be tested on the appliance in which they may be used.

1.4 Items unique to Canada

Clause 8 contains requirements that are unique to Canada.

1.5 Items unique to United States

Clause 9 contains requirements that are unique to the United States.

1.6 High altitude

Annex A outlines special construction provisions applicable to an appliance designed for use with an optional listed high- altitude conversion kit.

1.7 Fuel conversion

Annex B outlines special construction provisions that applicable to an appliance designed for use with an optional listed conversion kit.

1.8 Standard references

Clause 2 contains a list of standards specifically referenced in this Standard, and the sources from which these reference standards may be obtained.

1.9 Pressure references

All references to psi throughout this Standard are to be considered gauge pressure unless otherwise specified.

1.10 Measurement units

This Standard contains SI (Metric) equivalents to the yard/pound quantities, the purpose being to allow the Standard to be used in SI (Metric) units. IEEE/ASTM SI 10 or ISO 80000-1:2009 is used as a guide in making metric conversion from yard/pound quantities.

If a value for a measurement and a corresponding value in other units are stated, the first stated value is to be regarded as the requirement. The given corresponding value may be approximate. If a value for a measurement and a corresponding value in other units are both specified as a quoted marking requirement, the first stated unit, or both are to be provided.

1.11 Mandatory language

In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is required to satisfy 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 60079-29 specifies general requirements for construction, testing and performance, and describes the test methods that apply to portable, transportable and fixed equipment for the detection and measurement of flammable gas or vapour concentrations with air. The equipment, or parts thereof, is intended for use in explosive atmospheres and in mines susceptible to firedamp.

This part of IEC 60079-29 is applicable to flammable gas detection equipment with a measuring range up to any volume fraction as declared by the manufacturer, and which is intended to provide an indication, alarm or other output function; the purpose of which is to indicate a potential explosion hazard and in some cases, to initiate automatic or manual protective action(s).

For the purposes of this part of IEC 60079-29, the term “indicating up to a volume fraction of X % or X %LFL” includes equipment with an upper limit of the measuring range equal to or less than X % or X %LFL.

This part of IEC 60079-29 is applicable to equipment, including the integral sampling systems of aspirated equipment, intended to be used for commercial, industrial and non-residential safety applications.

This part of IEC 60079-29 does not apply to external sampling systems, or to equipment of laboratory or scientific type, or to equipment used only for process monitoring and/or control purposes. It also does not apply to open path (line of sight) detectors which are within the scope of IEC 60079-29-4. Only equipment with very short optical paths intended for use where the concentration is uniform over the optical path are within the scope of this standard.

For equipment used for sensing the presence of multiple gases, this part of IEC 60079-29 applies only to the detection of flammable gas or vapour. 

This part of IEC 60079-29 supplements and modifies the general requirements of IEC 60079-0. Where a requirement of this standard conflicts with a requirement of IEC 60079-0, the requirement of IEC 60079-29-1 takes precedence.

NOTE 1 IEC 60079-29-1 is intended to provide for the supply of equipment giving a level of safety and performance suitable for general purpose applications. However, for specific applications, a prospective purchaser (or an appropriate authority) can additionally require the equipment to be submitted to particular tests or approval. For example, Group I equipment (i.e. equipment to be used in mines susceptible to firedamp) might not be permitted to be used without the additional, prior approval of the relevant authority in mines under its jurisdiction. Such particular tests/approval are to be regarded as additional to and separate from the provisions of the standards referred to above and do not preclude certification to or compliance with these standards.

NOTE 2 All equipment calibrated on specific gases or vapours can not be expected to correctly indicate on other gases or vapours.

For the purposes of this standard, the terms "lower flammable limit (LFL)" and "lower explosive limit (LEL)" are deemed to be synonymous, and likewise the terms "upper flammable limit (UFL)" and "upper explosive limit (UEL)" are deemed to be synonymous. For ease of reference, the two abbreviations LFL and UFL may be used hereinafter to denote these two sets of terms. It should be recognized that particular authorities having jurisdiction may have overriding requirements that dictate the use of one of these sets of terms and not the other.

NOTE 3 Indication of concentration in %(v/v) or vol ppm can also be available for equipment which measures up to 100 %LFL or 20 %LFL. In that case, units of measurement might need to be selected in agreement with the manufacturer when verifying the performance requirements of Annex A.

1.1 General

This Standard contains requirements for the material, design, manufacture, marking, and testing of serially produced, refillable Type HGV2 containers intended only for the storage of compressed hydrogen gas for on-road vehicle operation. These containers

a) are to be permanently attached to the vehicle;

b) have a capacity of up to 1000 L (35.4 ft3) water capacity; and

c) have a nominal working pressure that does not exceed 70 MPa.

1.2 Container type

1.2.1 Cylindrical containers

Type HGV 2 containers are designated as follows:

a) Type 1: seamless metal container;

b) Type 2: hoop wrapped container with resin-impregnated continuous filaments and a metal liner;

c) Type 3: fully wrapped container with resin-impregnated continuous filaments and a metal liner; and

d) Type 4: fully wrapped container with resin-impregnated continuous filaments and a nonmetallic liner.

1.2.2 Conformable containers

Conformable container types are designated as follows:

a) CT1: container or assembly of a non-axisymmetric shape without a protective shell (i.e., outside wall containing gas pressure);

b) CT2: container or assembly of non-axisymmetric shape within a full or partial protective shell that is acting as a shield and not directly assisting the pressure containing elements with containing gas pressure; and

c) CT3: container or assembly of non-axisymmetric shape within a conformable protective shell that is acting as a shield and directly assisting the pressure containing elements with containing gas pressure.

The conformable container types shall have an additional identifier that is used in combination with the container type. A conformable container  shall be designated based on the design as a Type 1  to Type 4 with the additional conformable type identifier. For example, a Type 4 CT2 container would be required to meet the criteria for a Type 4 container as well as the criteria specified for a CT2 container.

1.3 Units of measurement

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.

1.4 Terminology

In this Standard, “shall” is used to express a requirement, i.e., a provision that the user shall 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.

1.5 Welded containers

This Standard does not cover welded metal containers or welded metal liners.

1.6 Precedence of requirements

Where a clause in this Standard is at variance with codes or standards referenced in this Standard, the requirements of this Standard shall govern.

1.7 Requalification of containers

In Canada, Type 1 steel containers may be requalified for further service in accordance with the procedure described in Annex E.

The scope of this project is to update the A440.2/.3 Standard, specifically after three Working Groups complete their work respectively on:

Condensation:  A Working Group was created to review the language of A440.2/.3 and look at how we reference NFRC 500.

LEAFF:  A Working Group was established to discuss referencing this new method in the A440.2/.3 based on implementation of the LEAFF program in the next issue of NFRC 100.  The working group shall verify if Energy Star has enforced that simulations have to be conducted by NFRC Certified Simulators and they will consider the challenge of educating Canadian Simulators not involved in ENERGY STAR.

ER:  This includes review of NRC Data, statement of work, including how it impacts our standard.

1.1 Inclusions

This Standard applies to fuel gas piping systems using corrugated stainless steel tubing (CSST), intended for installation in residential, commercial, or industrial buildings, and including the following components as a minimum:

a) corrugated stainless steel tubing (CSST) piping systems not exceeding a size of 2 in (50.8 mm), based on the nominal inside diameter of the tubing;

b) fittings for connection to the CSST; and

c) striker plates (see Clause 3) to protect the installed CSST from puncture threats.

Other components of piping systems covered by this Standard include gas manifolds, gas pressure regulators, manual gas valves, quick-disconnect devices, excess flow valves and gas convenience outlets (see Clauses 4.3, 4.4, and 4.5).

Note: If such additional components are required to complete the piping system installation, they are either provided as part of the piping system or specified in the manufacturer’s installation instructions [see Clause 4.7 n)].

1.2 Additional Inclusions

This Standard also applies to the following:

corrugated stainless steel piping systems in which portions of the piping are exposed to the outdoors, as required, to make connections to outdoor gas meters or to outdoor gas appliances, which are attached to, mounted on, or located in close proximity to the building structure; and

corrugated stainless steel piping systems that are used in conjunction with other approved fuel gas piping materials.

1.3 Exclusions

This Standard does not apply to the following:

CSST, whether coated or uncoated, intended for direct burial underground. Tubing is installed underground only when encased inside either an approved conduit or as part of an approved engineered system and in accordance with local codes and the manufacturer’s instructions; and

gas connectors for appliances. These connectors are covered by ANSI Z21.24 • CSA 6.10 and ANSI Z21.69 • CSA 6.16.

1.4 Concealment of tube fittings

This Standard includes criteria to establish the suitability of concealed mechanical tube fittings for use with concealed gas piping (see Clause 3).

1.5

1.6 System pressure units

This Standard applies to piping systems rated at

a) 5 psi (34.5 kPa) and intended for exposure to maximum actual operating pressures (see Clause 3) not exceeding 6.5 psi (44.8 kPa); or

b) 25 psi (172.5 kPa) and intended for exposure to maximum actual operating pressures not exceeding 30 psi (207 kPa).

Note: The manufacturer has the option to certify its system to either pressure rating.

1.7

1.8

1.9 Applicable fuels

This Standardapplies to piping systems intended for use only with fuel gas as defined in section 3, but does not apply to piping systems intended for use with propane in the liquid state.

1.10 Pressure references

All references to psi throughout this Standard are to be considered gauge pressure unless otherwise specified.

1.11 Measurement units

If a value for measurement as given in this Standard is followed by an equivalent value in other units, the first stated value is to be regarded as the specification.

Note: This Standard contains SI (metric) units corresponding to the yard/pound quantities, the purpose being to allow this Standard to be used in SI (metric) units. IEEE/ASTM SI 10, American National Standard for Metric Practice, or ISO 80000-1, Quantities and units — Part 1: General, is used as a guide in making metric conversion from yard/pound quantities. If a value for a measurement and a corresponding value in other units are both specified as a quoted marking requirement, the first stated unit, or both, are to be provided. Given corresponding values might be approximate.

1.12 Mandatory language

In this Standard, “shall” Is used to express a requirement, i.e., a provision that the user shall 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.

Draft Amendment to C22.1

Draft Amendment to C22.1

Draft Amendment to C22.1

Draft Amendment to C22.1

Draft Amendment to C22.1

1.1 

This Standard specifies requirements for photovoltaic (PV) rapid shutdown systems (PVRSS) and PV rapid shutdown equipment (PVRSE) intended to be used in ordinary locations in accordance with CSA C22.1, Canadian Electrical Code, Part I (CE Code, Part I) and rated 1500 V or less. A PVRSS is an integrated set of discrete components that work together to shut down one or more PV arrays installed on a building or structure.

1.2 

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.