Canadian Electrical Industry News Week

Electrical Code Updates

Bill Burr

The CE Code is a comprehensive document. Sometimes it can seem quite daunting to quickly find the information you need. This series of articles provides a guide to help users find their way through this critical document. In this article: Section 8 — circuit loading and demand factors.

This is not intended to replace the notes in Appendix B or the explanations of individual requirements contained in the CEC Handbook,* but will hopefully provide some help in navigating the Code.

Section 8 is a general section of the code. It provides you the information you need to selectthe rating of a circuit, feeder or service (i.e., ampacity of the circuit conductors and rating/setting of the circuit over current devices). Rule 8-104 describes the rating of a circuit (feeder or service) and establishes the criteria between the calculated load and circuit (feeder or service) rating. As well, it determines branch circuit positions for dwelling units.

The special terminology used in this section includes:

• Basic Load—only lighting and receptacle circuits based on the dimensions of specific building occupancy as listed in Table 14
• Calculated load – the load calculated in accordance with the rules in this section
• Demonstrated Load— the historical demand watt information recorded over 24 months for the same type of facility

The General section outlines methods of calculating voltage drop, maximum circuit loading, use of demand factors, number of branch circuit positions and determination of living areas.It specifies standard voltage divisers to be used when calculating currents from watts or volt-amperes in low voltage systems; maximum allowable voltage drop in installations; maximum circuit loading based on the overcurrent device used; and the calculated load. You will also find here the factors for determining a continuous, cyclic, or intermittent load, and how this affects the selection of conductors and equipment.

This section also outlines conditions for Use of demand factors; that is, where

• the size required for conductors and switches is not available in a standard size
• two or more loads are installed, but only one can be used at a time
• air conditioning and electric space heating are installed and only the greater load is used for calculating demand
• loads of a cyclic nature are installed such that the maximum load cannot be supplied at one time)

Where additional loads are added to an existing service or feeder, Rule 8-106(9) permits the load to be calculated by adding the sum of the additional loads to the maximum existing demand load measured over 12 months.Other demand factors can be based on demonstrated load calculations by a qualified person, as determined by the authority having jurisdiction.

Another function of this section is to outline the number of branch circuit positions needed for dwelling units. This is based on the ampacity of the service and whether a central electric furnace is intended.

The Services and feeders section outlines the methods of calculating the minimum ampacity of service or feeder conductors for various types of occupancies. Although the various options and conditions may seem complicated, methodically working through the demand factors for each type of occupancy will allow you to determine the correct ampacity for service or feeder conductors.

The methods for determining demand factors for dwelling units are divided intosingle dwellings and apartment and similar buildings.For single dwellings you are given two options depending on the size of the dwelling.In the first criterion, where the living area of the dwelling exceeds 90 m2, the basic load is 5000w and additional loads are added with various demand factors as listed in Rule8-200 (1)(a)(ii to vii). The second criterion is to use a basic load of 100 A if the floor area is 80m2 or more, or 60 A if the floor area is less than 80 m2. Note that Rule8-110 designates how to determine the living area.

For two or more dwelling units of row houses, the minimum ampacity of service or feeder conductors from a main service is based on the above demand factors for each single dwelling, excluding electric space heating and air-conditioning loads, plus the demand factors outlined in Rule 8-202(3).

For apartments and similar buildings, the minimum ampacity of service or feeder conductors from a main service is calculated according to Rule 8-202.As with single dwellings and row houses above, the basic load is based on living area plus the demand factors for various other loads as outlined in Rule 8-202 (1 to 4). It should be noted that the load calculated for a single dwelling or for dwelling units in an apartment building is not considered to be continuous. However, a house load (i.e., load of equipment installed in a common area of an apartment building) is considered to be continuous for the purpose of Rule 8-104.

There are specific rules for determining the ampacity of service or feeder conductors for schools (Rule 8-204), hospitals (Rule 8-206), and hotels, motels, dormitories, and buildings of similar occupancy (Rule 8-208). For other occupancies, as listed in Table 14, the calculations are in Rule 8-210.

One other consideration is exit, emergency and show window lighting where the loads may be spread throughout the building. Exit and emergency lighting demand shall be determined by connected load. In the case of show window lighting, demand is based on 650W/m measured along the base of the windows.

This section also outlines required branch circuit positions and demand factors. Rule 8-300 provides demand loads for branch circuits supplying electric ranges and cooking units. Rule 8-302 specifies that branch circuits supplying data processing equipment be considered continuous loads. Rule 8-304 specifies that the maximum number of outlets per any 2-wire circuit is 12, unless the actual connected load is known and the load current doesn’t exceed 80% of the overcurrent device rating.This means that the load of a typical 2-wire circuit protected by a 15 A rated overcurrent device is considered to be 12 A.

Rule 8-400 provides guidance for the number and loading of branch circuits for automobile heater receptacles generally, and where the loading on each receptacle is controlled or restricted.

In the next installment we will look at Section 10 — Grounding and bonding.

Read the rest of the instalments in the series:
Part 1: Guide to the CE Code, Part I – A Roadmap (Installment 1 in a Series)
Part 2:
A Road Map to the CE Code, Part I – Installment 2
Part 3: Guide to the Canadian Electrical Code, Part I – Installment 3
Part 4: A Road Map to the CE Code, Part 1 – Installment 4
Part 5: Guide to the Canadian Electrical Code, Part I — Installment 5
Part 6: Guide to the Canadian Electrical Code, Part I — Installment 6
Part 7: Guide to the Canadian Electrical Code, Part I — Installment 7
Part 8: Guide to the Canadian Electrical Code, Part I — Installment 8
Part 9:
Guide to the Canadian Electrical Code, Part I — Installment 9
Part 10: Guide to the Canadian Electrical Code, Part 1 - Installment 10
Part 11: Guide to the Canadian Electrical Code, Part 1 - Installment 11


 

William (Bill) Burr is the former Chair of the Canadian Advisory Council on Electrical Safety (CACES), former Director of Electrical and Elevator Safety for the Province of BC, and former Director of Electrical and Gas Standards Development and former Director of Conformity Assessment at CSA Group. Bill can be reached at Burr and Associates Consulting billburr@gmail.com.

 

Contractors! You Deserve Better.

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2021 Canadian Electrical Code Overview of Changes

EIN CSA Group Logo 2022 400CSA C22.1:21, Canadian Electrical Code, Part I contains many updates and changes that are potentially significant to electrical professionals. This online, self-guided course provides the key changes and impacts to the industry presented in an easy-to-follow format.

 Designed for professionals with a good working knowledge of the Code and who solely need the key changes including general updates or those made for clarification, safety, and new products and systems. Key changes due to Rule relocation or deletion are also noted.

This course may help save valuable time to help keep electrical projects safe and in compliance. This training is developed with input from a broad cross-section of electrical industry experts and with cooperation from all provinces, territories and several key jurisdictions across Canada. 

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Natural Resources Canada will provide funding through non-repayable contributions of between 50 and 75 percent of the total eligible project costs, with a maximum funding of up to $300,000 per project. The CFP will close on August 18, 2022.

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Omnicable joins ETIMETIM North America announced that OmniCable has joined the product classification standards organization. Headquartered in West Chester, PA, OmniCable has 24 locations throughout North America, and also owns Houston Wire & Cable (HWC). The company partners with many electrical manufacturers and only sells to distributors.

According to John Dean, Director of Marketing & E-Commerce, OmniCable/HWC, “The wire and cable industry is often called commodities, but there are very distinct features and attributes for the different products our manufacturers produce. 

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Atkore United Poly SystemsAtkore Inc. announced that it has acquired United Poly Systems, a manufacturer of High Density Polyethylene (HDPE) pressure pipe and conduit, primarily serving telecom, water infrastructure, renewables, and energy markets.

“We are pleased to complete the acquisition of United Poly Systems, which strengthens Atkore’s product portfolio, expands our manufacturing capacity and further enables us to meet HDPE customers’ needs,” stated John Pregenzer, President of Atkore’s Electrical business. “HDPE pipe and conduit is a growing market that is expected to benefit from U.S. infrastructure legislation, and United Poly Systems is a great addition to Atkore. We welcome these employees and look forward to working together to continue to serve and support our customers.”

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Canadian Electrical Contractor Discussion Group: Can You Count the Deficiencies?

EIN CECD 400Have you ever been called to fix the work of a 'handyman'?

"Was supposedly done by a"certified ' electrician....told the homeowner that he got a $266 permit....no record at TSBC. Can you count the deficiencies?"

"There is a second panel change in the triplex also.......even more deficiencies. Think the guy was a glorified handyman. Ones not obvious: 240 BB heat hooked up 120....drier on 2p20....range on 2p50....water heater fed with 2c14 Bx on 2p15."

Go HERE to join the discussion

 


 

Grimard is more competitive and produces estimates 3X faster with Procore

Procore

When the pandemic lockdowns started in March of 2020, Grimard (an electrical contractor) had to decide whether to shut down its operations entirely or implement a new platform with people who were now freely available for work. Once they implemented Procore, they found a way to efficiently communicate with stakeholders and offer full transparency in terms of project costs and planning. It also allowed Grimard to utilize historical data to make project estimates more accurate. Grimard was able to streamline its bidding process, which made it more attractive to potential clients and helped the business grow.

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Iron+EarthThe RenuWell Project partners are excited to announce the groundbreaking of two pilot sites located near Taber, Alberta. These pilot sites are the first of their kind to repurpose inactive oil and gas infrastructure as a foundation for renewable energy development and job creation.

When operating, the solar projects will generate 2,030 MWh annually – enough electricity to power 280 average Alberta households or irrigate 11,700 acres of farmland for an average year. This is roughly equivalent to $200,000 in electricity sales per year with 1,100  tCO2e savings in GHG emissions. Over a 25-year lifespan, the projects will generate 50,750 MWh, with GHG emission savings of 28,420 tCO2e.

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David O'ReillyBy Elle Bremmer

Recently, I had the pleasure of sitting down with David O’Reilly, Vice President Home & Distribution and Secure Power Divisions with Schneider Electric Canada for a discussion regarding the Wiser EnergyTM smart home solution, the Wiser Approved training program, and his thoughts on several different subjects, including sustainability and future technologies currently in the works at Schneider Electric. David has been with the company for five and a half years in his role.

We recently published a study (version en français ICI) from Schneider Electric showing a strong interest from Canadians in smart home technology. 

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Infinitely capable, these ruggedly built products have several industry leading & exclusive features including:

Industrial String Lights:

  • A United States Navy Specification since before WWII, they’re time and application tested...

 

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Intermatic Pool and Spa SolutionIntermatic Incorporated announced its new P40000 Series Load Centers, a set of next-generation panels for pool-only applications, as well as its new PE24GVA 24-Volt Valve Actuator, an easy-to-install valve actuator that allows for tool-free cam adjustments. Both solutions remove obstacles for pool service professionals while delivering lasting performance.

“Intermatic load centers and valve actuators have been the preferred choice of pool professionals for more than 30 years,” says Brian Lamberty, product marketing manager at Intermatic. “The PE24GVA and P40000 Series build on that tradition, helping pool professionals streamline service calls while setting the standard for quality and performance.”

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Klein Tools Zipper BagsKlein Tools introduces new Stand-up Zipper Bags, in a 2-Pack with 7-Inch and 14-Inch sizes, both designed to handle tough jobsite conditions and stand up so tools and small parts can be easily accessed when working.

Stand-up Zipper Bags, 7-Inch and 14-Inch, 2-Pack (Cat. No. 55559)

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Emerson HV SafetyThe Occupational Safety and Health Administration (OSHA) estimates 350 employees are killed annually in electrocution accidents, which roughly equals one fatality per day. In the face of these dangers, OSHA officials and industry safety consultants alike recommend eliminating potential hazards on work sites, rather than simply relying on contractors or employees to follow safety guidelines.

To help safeguard employees from electrocution, Emerson has launched its Appleton™ Powertite™ Lock Collar, a device that fastens over plug and connector connections and is secured with a padlock, preventing unauthorized personal from disconnecting the cable connection once in place. 

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Copper $US Dollar price per pound

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