Canadian Electrical Industry News Week

May 3 2016

William (Bill) Burr

In this article: CE code Section 20 — Locations in which corrosive liquids, vapours, or excessive moisture are likely to be present. The code is a comprehensive document. Sometimes it can seem 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. This is not intended to replace the notes in Appendix B or the explanations of individual requirements contained in the CEC Handbook, but will provide some help in navigating the code.

General

Section 22 amends or supplements the general requirements of the code. It provides specific rules for locations classified as Category 1 (moisture) or Category 2 (corrosive) environments that are sufficient enough to interfere with the normal operation of electrical equipment.

A Category 1 location is defined as one where moisture in the form of vapour or liquid is present. The moisture can be caused by condensation, dripping or splashing of liquid, or other means. A Category 2 location is defined as one where corrosive liquids or vapours are likely to be present. Where neither Category is mentioned in a rule in this section, then the rule applies to both categories. Appendix B contains examples of Category 1 and 2 occupancies.

Equipment

As per rule 22-100, only equipment that is essential to the process being carried out in that area may be located in a Category 1 or 2 location. Service equipment, motors, panelboards, switchboards and similar equipment need to be installed outside the category area. This includes any enclosures containing moulded case circuit breakers in a Category 2 location unless they have been approved and marked as suitable for that application, because internal corrosion can occur.

Rules 22-102 (1) to (6) outline the types of construction required of equipment to be installed in the various moist or corrosive atmospheres. This information is marked on the equipment if not self-evident.

Rules 22-104 to 22-108 specify requirements for pendent lamp holders, luminaires, receptacles, plugs, and portable cords to be installed or used in Category 1 or Category 2 locations.

Wiring

Rule 22-200 provides the requirements for wiring in Category 1 locations. Generally conductors must be selected in accordance with rule 4-008(1) and table 19. Note that NM cable must be NMU or NMWU, MI cable must be spaced 6mm from any wall at supports, and aluminum conductors must have joints adequately sealed against moisture.

Rule 22-202 provides the requirements for wiring in Category 2 locations. All conductors must have protection from corrosion. NMW and NMWU cable is permitted. Raceways, conductors and cables may only be used as permitted by Table 19. MI, alu-sheathed and copper-sheathed cable must be suitably corrosion protected. Any termination or joint of aluminum conductors must be adequately sealed against ingress of corrosive liquids or vapours.

Rule 22-204 outlines the appropriate wiring methods in buildings housing livestock or poultry. Again generally, these are wet or damp locations and all wiring must be selected in accordance with rule 4-008(1), with consideration given to adequate ventilation for a damp location. NMW or NMWU cable may be used, but aluminum conductors may not, and NMS cable must be provided with mechanical protection against damage by rodents.

Rule 22-206 deals with wiring in curling and skating rinks. Generally, lighting areas are subject to condensation so wiring must be selected in accordance with Rule 4-008(1) and Table 19 for wet locations. Other areas may be wired in accordance with Section 12 observing any moisture conditions. Areas with adequate mechanical ventilation (at least three changes per hour) may be considered dry locations.

Drainage, sealing, and exclusion of moisture and corrosive vapour

Rules 22-300 and 22-302 specify methods for excluding moisture and corrosive vapours from entering conduit, cables, equipment or locations through the use of approved fittings, drip loops, adequate drainage, sealing, and orientation.

Circuit control

Rule 22-400 requires that each circuit in a Category 1 or 2 location must be capable of being de-energized from outside the location.

Materials

Rule 22-500 specifies that all metal materials including conduit, enclosures, and even every nut bolt and screw must be corrosion protected or resistant to the specific corrosive environment.

Bonding

Rule 22-600 requires all non-current carrying metal parts of equipment to be bonded to ground as per Section 10.

Sewage lift and treatment plants

Rules 22-700 to 22-710 apply to installations in sewage lift, pumping stations and treatment plants where moisture, corrosion, explosions, fire and atmospheric poisoning can occur. Note that the rules of Section 18 apply to associated methane gas generating facilities.

Rule 22-702 outlines some special terminology used in this subsection to define continuous positive pressure ventilation, dry well, suitably cut off, and wet well.

Rule 22-704 provides guidelines for the classification of these types of areas that may be both Category 1 or 2, and hazardous locations under Section 18. Reference material for hazardous area classification can be found in NFPA 820. Appendix B also has some notes regarding safety issues in these types of facilities.

Rule 22-706 specifies that wiring methods in these types of areas shall be in accordance with Rules 22-200, 22-202 or Section 18 depending on the location classification. Note that there are some restrictions, conditions and special handling for metal conduit, tubing, armoured cable, mineral-insulated cable, aluminum sheathed cable, and copper-sheathed cable.

Electrical equipment

Rule 22-708 specifies that electrical equipment in these types of areas shall be in accordance with the other applicable sections of the code or Section 18, depending on the location classification. Note that there are some restrictions, conditions and special handling for receptacles, lighting switches, unit emergency lighting equipment, emergency lighting control units, heating equipment, motors, and any electrical equipment in a wet well. Also note in sub-rule 22-708(4) that ventilation fans shall not be located in a wet well. One other significant sub-rule, 22-708(5), requires that areas provided with continuous positive ventilation must be interlocked to de-energize all electrical equipment if the ventilating equipment becomes inoperative, unless the electrical equipment in that area is approved for a Class 1 hazardous location.

Rule 22-710 requires all structural steel below ground, in contact with earth to be bonded to the system ground.

In the next instalment we will be discussing Section 24 — Patient care areas.

* The source for this series of articles is the Canadian Electrical Code, Part I, published by CSA


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
Part 12: Guide to the Canadian Electrical Code, Part 1 — Instalment 12
Part 13: Guide to the Canadian Electrical Code, Part 1 — Instalment 13 
Part 14: Guide to the Canadian Electrical Code, Part 1 — Instalment 14
Part 15: Guide to the Canadian Electrical Code, Part I — Instalment 15


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.

 

 

 

 

 

Changing Scene

  • Prev
ESA’s response team has been working diligently to address the emerging issues. We are moving into ...
Littelfuse invites plant engineers, facility managers, and maintenance professionals to join its ...
This recall involves Legrand / Pass & Seymour commercial-grade tamper resistant duplex ...
In response to the current COVID-19 crisis, IDEAL Canada was looking for ways to contribute to the ...
Join Nexans for a free webinar as Isaac Müller, Applications Engineer for Nexans discusses this ...
IDEAL INDUSTRIES has made the difficult but necessary decision to cancel the original ...
The Regional Electrical Inspector performs physical inspections on all types of electrical ...
The Alberta Electrical Alliance (AEA) released a video message from their Provincial Board of ...
A new white paper published by Mohawk College’s Energy and Power Innovation Centre explains how ...
With the COVID-19 crisis underway, EFC is working diligently to provide current electrical ...

Vallen CanadaIn the midst of the pandemic crisis, safety & MRO specialist Vallen Canada moved its 6,000 square foot West Edmonton, Alberta branch to a new 20,000 square foot location, enabling the branch to triple its inventory. How did the company keep everyone safe during the transition? Vallen Canada simply relied on its own expertise.

“We had to really do a good gut check on whether this was the right decision to move the branch during the pandemic,” says Vallen Canada President Karen Chester. “The reality is the show must go on… our culture is such that we pull together in tough times and we need to get the job done. The final step in the process was to make sure we keep people safe.”

Read More

 

Emergency HospitalsAs the battle against COVID-19 continues, medical providers all over the world are expanding their capacity to treat patients through the construction of temporary hospital facilities and tents. Eaton and its partners recently helped realize a project by the United States Army Corps of Engineers at Stony Brook University Hospital in New York, supplying essential power distribution equipment for four temporary medical facilities with the capacity to treat more than 1,000 patients. Construction on the facility is expected to be completed this week, with nearly 100 Eaton heavy-duty safety switches providing reliable power distribution to support life-saving ventilators and other devices.

Read More

 

 

Step-Down TransformersBy Max Ezzati

Step-down transformers allow any electrical product to be installed on 347V circuits, which is why many electrical contractors keep a few in their car stock. Selecting the correct step-down transformer ensures the physical dimensions of the transformer are as small as possible to fit easily in the junction box while keeping costs as low as possible. Here are our tips on selecting the best step-down transformer for your job.

 

 

Read More

 

 

Product News

  • Prev
In 2020, Louis Poulsen and BIG Ideas present a comprehensive new lamp series, Keglen, especially ...
Architectural sound absorbing 100% Merino Wool Felt. Made from carbonized wool treated with ...
Universal Lighting Technologies recently introduced 180W PWX LED drivers. These drivers are ideal ...
Venture Lighting International has partnered with Synapse Wireless to enhance the capabilities of ...
In its aim to develop high-performance, long-lasting, and robust lighting solutions, LUBO Lighting, ...
The highly-efficient Juno® UPLD swivel LED undercabinet in 9, 14, 22 and 30” lengths have an easily ...
Lumenpulse has launched the Lumenblade family: a collection of contemporary classic rectilinear ...
The Lithonia Lighting FML4W is a new wide housing LED Wraparound. While suitable for new ...
Douglas Lighting Controls, a member of the Panasonic family of companies, recently introduced the ...
Arlington's new low profile 5x8" TV Box™ features a steel back box for use with MC, AC and flexible ...

 

Louis Poulsen Lamp SeriesIn 2020, Louis Poulsen and BIG Ideas present a comprehensive new lamp series, Keglen, especially characterised by its distinctive design as well as classic superior lighting quality.

The key pieces in the Keglen series are four pendants (Ø175), (Ø250), (Ø400) and (Ø650) that each provide their very own diffusion of light using a curved glass insert, which is built into and adapted to each version of the shade.

The main feature of the lamp is the organic shaped glass that sits perfectly beneath the cone as a small water droplet shaped by physics and cohesive forces in nature, says Jakob Lange, Partner, BIG Ideas.

 

Read More

Universal Lighting EVERLINE PWX LED DriversUniversal Lighting Technologies recently introduced 180W PWX LED drivers. These drivers are ideal for outdoor luminaire applications, such as street, roadway and site area lighting, as well as, indoor highbays using non-Class 2 drivers.

“As the outdoor and industrial lighting segments continues to expand, Universal is focused on providing solutions that help our customers capture more market opportunities by increasing controllable options,” said Kevin Boyce Director of Product Management for Universal. “The PWX drivers are available with 12Vdc or 24Vdc auxiliary power for lighting applications with on-board sensors or radios.”

Read More

 

Peers & Profiles

  • Prev
Hazmasters was founded with a dedication and focus on creating safer work environments. It is ...
ELG Electric is an electrical contractor based out of Goderich, Ontario serving the area’s ...
Founded by Warren Osak, Electromate specializes in Robotic and Mechatronic Solutions, distributing ...
 Will West is a first-year apprentice working in the solar industry with Hakai Energy ...
“It’s definitely the Olympics of our trade,” said Lance Giesbrecht of the Ideal National ...
Tommy Carducci is a 14-year industry veteran working with Seneca Electrical and was one of 18 ...
Legend Power Systems is an innovative Canadian company headquartered out of Vancouver, B.C. Their ...
Founded in 1942, Franklin Empire is Canada’s largest independent electrical distributor.   ...
Nick Foster is Territory Manager, New Brunswick & P.E.I for Leviton. Foster was recently ...
Held from November 7th to 9th in Orlando, Florida and aired on ESPN 2, the Ideal National ...

HazmastersHazmasters was founded with a dedication and focus on creating safer work environments. It is distributor of safety products servicing customers in the industrial, construction, commercial, institution, and government markets.

The company supplies safety products, conduct safety inspections and tests, as well as service and repair safety products it. A company that educates and trains. A company that delivers every aspect of workplace safety to the employer and follows up to make those solutions easy to implement and sustain.

 

Read More

 

 

Copper $US Dollar price per pound

Kerrwil Publications Great Place to Work. Certified December 2019 - December 2020

538 Elizabeth Street, Midland,Ontario, Canada L4R2A3 +1 705 527 7666
©2020 All rights reserved

Use of this Site constitutes acceptance of our Privacy Policy (effective 1.1.2016)
The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of Kerrwil