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Canadian Electrical Code Full Impact Assessment
Subject 3915
Update Section 8: Correlation of load calculation Rules with Rule 8-104
© CSA GROUP
Full Impact Assessment Subject 3915 Update Section 8 for Correlation of load calculation rules with rule 8-104
Page 1 16/01/2018
CONTENTS
1 INTRODUCTION TO THE FULL IMPACT ASSESSMENT ............................................... 3
2 PURPOSE OF THE FULL IMPACT ASSESSMENT ........................................................ 3
3 BACKGROUND OF THE CHANGE .................................................................................. 4
4 THE NATURE OF THE CHANGE ..................................................................................... 4 4.1 How is it different from the Status Quo? ......................................................................... 4
5 PURPOSE/ REASON FOR THE CHANGE ....................................................................... 5 5.1 What is the issue that the change is intended to address? ............................................ 5 5.2 How does the change accomplish the desired results? ................................................. 5 5.3 What are the implications/consequences if action is not taken? .................................... 5
6 WHY IS ACTION REQUIRED AT THIS TIME? ................................................................. 6
7 (14) PREVALENCE OF RULE USE IF ACCEPTED ......................................................... 6
8 IMPACT ON KEY STAKEHOLDERS ................................................................................ 6 8.1 (16) Largest type of stakeholder who would benefit ....................................................... 6 8.2 (24) Largest type of stakeholder who would be negatively affected ............................... 6 8.3 (15) Other stakeholders affected on frequent basis ....................................................... 6 8.4 Is the proposed change limited to a specific group/geographic area?............................ 6 8.5 What is the affected stakeholders’ readiness to act on the change(s) ........................... 6 8.6 Recommended stakeholder management strategy ........................................................ 7 8.7 Communication and implementation plan ...................................................................... 7
9 ANALYSIS OF ANTICIPATED ECONOMIC IMPACT ...................................................... 7 9.1 (20) The jurisdiction or stakeholder’s ability to compete based on incompatibility with other standards ............................................................................................................................. 7 9.2 (21) Complexity of Implementation (is training required to be able to implement the rule?) ........................................................................................................................................ 7 9.3 (22) Total costs to implement (for example cost to install, educate, to manufacture/or inspect, purchase additional product, and of the increased use of electricity) .............................. 7
10 IMPACT ON BUSINESS: LARGE AND SMALL (IF APPLICABLE) ................................ 7
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Full Impact Assessment Subject 3915 Update Section 8 for Correlation of load calculation rules with rule 8-104
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11 WHAT IS THE PRACTICE/EXPERIENCE IN OTHER JURISDICTIONS? ....................... 8 11.1 Are standards consistent with (or lesser/greater than) other jurisdictions? .................... 8 11.2 (23) Conflict with other Ministries or Codes .................................................................... 8 11.3 Consequence on other Departments/Ministries, e.g. apprentice training ....................... 8 11.4 Consequence on other Codes from other jurisdictions (US, European standards) ........ 8
12 CONSULTATION PROCESS ............................................................................................ 8
13 PROPOSED EFFECTIVE DATE OF CHANGES .............................................................. 9
14 APPENDIX 1 CODE RANKING TOOL VALUES ............................................................ 10
© CSA GROUP
Full Impact Assessment Subject 3915 Update Section 8 for Correlation of load calculation rules with rule 8-104
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1 INTRODUCTION TO THE FULL IMPACT ASSESSMENT
The Full Impact Assessment follows the rationale of the Canadian Electrical Code Ranking Tool (CRT) and provides supporting information to validate the rankings of the CRT. It includes all the questions of the CRT either verbatim or modified. However, the scope of the Full Impact Assessment extends beyond that of the CRT and therefore the document includes additional questions that may help to further substantiate the rankings.
The CRT is referenced throughout the Full Impact Assessment. Questions contained in the CRT are included in the Full Impact Assessment and identified by numbers in parentheses. Whenever applicable, chapter titles also include references to sections of the CRT discussed in the chapter.
While an effort has been made to follow the sequence of the CRT as closely as possible, risk – related and benefits – related questions have not been separated in the Full Impact Assessment to enhance the analytical function of the document.
2 PURPOSE OF THE FULL IMPACT ASSESSMENT
The purpose of the Full Impact Assessment is to provide the Provinces and Territories with an enhanced rationale and detailed assessment of a particular change to the Canadian Electrical Code (CEC). The following assessment is submitted for review to provincial and territorial regulatory authorities to aid with their adoption process of the Code. Jurisdictions may decide to conduct further analyses and hold additional consultations.
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Full Impact Assessment Subject 3915 Update Section 8 for Correlation of load calculation rules with rule 8-104
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3 BACKGROUND OF THE CHANGE
Code users have indicated that the referenced rules appear to mandate only selection of minimum ampacity of service and feeder conductors based on the methods for load calculations prescribed by these rules. However, these rules are silent on a need to select the O/C device in the service or feeder that supplies the loads, calculated in accordance with these rules.
4 THE NATURE OF THE CHANGE
4.1 How is it different from the Status Quo?
Revise title of the Subsection that cover Rules 8-200 – 8-212 to read: Calculated load for Sservices and feeders Revise Rules 8-200 to 8-210 as shown (2015 Code text shown).
8-200 Single dwellings (see Appendix B)
(1) The minimum ampacity of service or feeder conductors Calculated load for the service or feeder supplying a single dwelling shall be based on the greater of Item (a) or (b): (no change to remainder) 8-202 Apartment and similar buildings (see Appendix B)
(1) The minimum ampacity of service or feeder conductors Calculated load for the service or feeder from a main service supplying loads in dwelling units shall be the greater of Item (a) or (b): (no change to remainder) 8-204 Schools (1) The minimum ampacity of service or feeder conductors Calculated load for the service or feeder shall be based on the following: (no change to remainder)
8-206 Hospitals (1) The minimum ampacity of service or feeder conductors Calculated load for the service or feeder shall be based on the following: (no change to remainder) 8-208 Hotels, motels, dormitories, and buildings of similar occupancy (see
Appendix B)
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(1) The minimum ampacity of service or feeder conductors Calculated load for the service or feeder shall be based on the following:
(a) a basic load of 20 W/m2 of the area of the building, based on the outside dimensions; plus
(no change to remainder) 8-210 Other types of occupancy The minimum ampacity of service or feeder conductors Calculated load for the service or feeder for the types of occupancies listed in Table 14 shall be based on: (no change to remainder)
5 PURPOSE/ REASON FOR THE CHANGE
5.1 What is the issue that the change is intended to address?
It was indicated by the Code users that although the Code Handbook provides examples of selection of the minimum ampacity of service/feeder conductors and ampere rating of the O/C devices based on the requirements of these rules, these rules fail to reference Rule 8-104 as the fundamental criteria for ampere rating of a service or a feeder based on the calculated load (regardless whether such loads are non-continuous or continuous). This fact creates confusion among the Code users, particularly in classes where the Code is being taught. 5.2 How does the change accomplish the desired results?
The entire Subsection 8-200 - 8-212 applies not to the "minimum ampacity of conductors" and not the "rating" of the circuit/feeder/service, but to the calculated loads for services or feeders. Calculated load is based on specific conditions of each Rule in Subsection 8-200 - 8-212. This change will remove long existing ambiguity in the wording of each Rule in this Subsection.
5.3 What are the implications/consequences if action is not taken?
The connection between rule 8-104 and the demand calculations, for Services and Feeders, which stem from the 8-200 series of rules, is something that has been lacking in our code for some time. Without this clarity confusion on these requirements will still exist.
© CSA GROUP
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6 WHY IS ACTION REQUIRED AT THIS TIME?
It is important to improve the wording of the code when known confusion exists. Such revisions will not only clarify the objective of these rules, but will improve consistency in their application, which will result in improvement of electrical safety.
7 (14) PREVALENCE OF RULE USE IF ACCEPTED
Methods for load calculations prescribed by these rules are expected to see daily use.
8 IMPACT ON KEY STAKEHOLDERS
8.1 (16) Largest type of stakeholder who would benefit
Clarity introduced by these changes will benefit installers, trainers and others who reference the code frequently. 8.2 (24) Largest type of stakeholder who would be negatively affected
These changes should not have a significant negative impact on any stakeholder however, training programs and literature, including electronic content, will need to be updated to include the change. 8.3 (15) Other stakeholders affected on frequent basis
The revision will affect a broad range of stakeholder groups, namely:
Other standard development organizations (SDO). All references to the part of the CEC being modified will need to be updated in the relevant documents published by other SDOs.
8.4 Is the proposed change limited to a specific group/geographic area?
The change will have a nationwide application. 8.5 What is the affected stakeholders’ readiness to act on the change(s)
Research has not revealed any evidence of market not being ready to implement the changes discussed in the revision.
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8.6 Recommended stakeholder management strategy
Not applicable. 8.7 Communication and implementation plan
Not applicable.
9 ANALYSIS OF ANTICIPATED ECONOMIC IMPACT
9.1 (20) The jurisdiction or stakeholder’s ability to compete based on incompatibility with other standards
The revision should not affect a jurisdiction’s competitive position. 9.2 (21) Complexity of Implementation (is training required to be able to implement the rule?)
This clarity provided by this change is intended to eliminate confusion of a somewhat complex requirement and may require formal training. 9.3 (22) Total costs to implement (for example cost to install, educate, to manufacture/or inspect, purchase additional product, and of the increased use of electricity)
The cost to implement this change will mainly be needed for training purposes and is anticipated to be low.
10 IMPACT ON BUSINESS: LARGE AND SMALL (IF APPLICABLE)
Compliance costs. Initial compliance will increase the anticipated project costs, but there are several options available to optimize costs.
Change of investment. Not applicable.
Job creation / job loss. Not applicable.
Labour mobility. Not applicable.
Impact on import/export of goods. Not applicable.
Certification and licensing. Not applicable.
Insurance. Not applicable.
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11 WHAT IS THE PRACTICE/EXPERIENCE IN OTHER JURISDICTIONS?
11.1 Are standards consistent with (or lesser/greater than) other jurisdictions?
Currently there are no deviations from the national CEC on this item in provincial electrical codes. 11.2 (23) Conflict with other Ministries or Codes
Not applicable.
11.3 Consequence on other Departments/Ministries, e.g. apprentice training
Not applicable. 11.4 Consequence on other Codes from other jurisdictions (US, European standards)
Not applicable.
12 CONSULTATION PROCESS
The following groups of stakeholders were involved in the consensus approval of this change as part of CSA’s standards development process. For details please refer to Appendix C of the Canadian Electrical Code.
Groups that have been involved in accepting this change include:
Regulatory authorities selected from various provincial, territorial and municipal electrical inspection authorities.
Owners/Operators/Producers selected from groups with national stature, representing the viewpoints of electrical equipment manufacturers, electrical installation designers and installers and electrical installation users.
General interest representatives selected from groups with national stature, representing the viewpoints of :
(a) fire chiefs
(b) electric utilities
(c) committees responsible for related electrical codes and standards
(d) fire insurers
(e) labour
(f) issuers of building codes, and
(g) educators
© CSA GROUP
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A regulatory/legislative body may want to hold additional consultations with all or some of these
groups within their jurisdiction to clarify issues specific to the jurisdiction.
13 PROPOSED EFFECTIVE DATE OF CHANGES
The change will be included in the CEC 2018 edition published January, 2018.
© CSA GROUP
Full Impact Assessment Subject 3915 Update Section 8 for Correlation of load calculation rules with rule 8-104
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14 APPENDIX 1 CODE RANKING TOOL VALUES
© CSA GROUP
Full Impact Assessment Subject 3915 Update Section 8 for Correlation of load calculation rules with rule 8-104
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Subject #3915
2
4
10
3
10
7
0
36
6
4
5
21
2
4
2
0
3
12
Total 69
Purely administrative Community's desire to change - Environment, Health, Safety
Safety consideration (Severity)
Safety consideration (Frequency) For clarity
Crucial to harmonize
Technological change/New Rule
Total Score for Extent of Use
Total Score for Reason for Change
Extent of Use & Value AddPrevalence of rule use if accepted
Number of stakeholders affected on frequent basis
Complexity of implementation
Largest type of stakeholder who would be negatively affected
Total Score for Risk of Changing Rule/ Staying Status Quo
Reason for Change
Risk for Changing Rule/Staying Status The jurisdiction or stakeholder's ability to compete based onincompatibility with other standards
Total costs to implement, e.g. cost to install, to educate, tomanufacture,or inspect, increased product cost, increasedcost of electricity.
Conflict with other Ministries or Code
Largest type of stakeholder who would benefit
Benefit to society
6
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