Canadian Electrical Industry News Week

CSAApr 9, 2017

By William (Bill) Burr

In this article: Section 42 — Electric welders. 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. 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.

Rule 42-000 Scope — states that Section 42 is a supplementary or amendatory section of the code and applies to the installation of electric welders. The CEC Handbook provides additional notes and diagrams to better explain this section. There are two main types of welders: arc and resistance welders. Arc welders use a sacrificial rod to weld the metal target material together. Resistance welders fuse the metal target material together. Arc welders are divided further into transformer and motor-generator types.

Rule 42-002 Special terminology — contains definitions for special terms that apply to section 42 that are not defined in Section 0 such as: actual primary current, duty cycle, and rated primary current. These terms will be important when calculating the ampacity of the supply conductors for welders.

Rule 42-004 Receptacles and attachment plugs — outlines that, where receptacles are installed for the plug and cord-connection of a portable welder, the ampacity rating of the overcurrent protection for the circuit can be more than the rating of the receptacle, but the receptacle must have a rating equal to or greater than the ampacity of the supply conductors for the welder. This is important because the high instantaneous inrush start-up current of the welder will exceed the branch circuit conductor ampacity. This prevents nuisance tripping.

Transformer arc welders

Rule 42-006 Supply conductors — provides the factors in determining the ampacity of supply conductors for transformer type arc welders. The ampacity depends on the duty cycle of a single welder, as in sub-rule (1) and the demand factors where a group of welders are supplied by one circuit as in sub-rule (2). The CEC Handbook contains Tables 42-1 and 42-2, which show the correlation between duty cycle and demand factor and determination of the demand factor for multiple welder installations.

Rule 42-008 Overcurrent protection for transformer arc welders — specifies the factors to be used in calculating the rating of circuit overcurrent protection per the ampacity of supply conductors and welders as in sub-rule (1). Sub-rule (2) outlines the factors in calculating the rating of the overcurrent protection for the supply conductors using Tables 1,2,3, or 4. Sub-rule (3) provides the factors in calculating the rating of the overcurrent protection for a feeder supplying a group of transformer arc welders.

Rule 42-010 Disconnecting means — requires that where there is no integral disconnect on the welder, one must be provided to disconnect the supply conductors, and it must have sufficient current rating capacity to accommodate the overcurrent protection.

Motor-generator arc welders

Rule 42-012 Conductors, protection, and control of motor-generator arc welders — specifies that the rules of Section 4 and Section 28 generally apply to the determination of supply conductor ampacity, and selection of protection and control. The CEC handbook outlines methods of calculation of duty-related demand factors through Table 42-1, 42-2 and 42-3.

Resistance welders

Rule 42-014 Supply conductors for resistance welders — provides the factors in determining the ampacity of supply conductors depending on the primary current or duty cycle of either an individual seam resistance welder or an automatically fed resistance welder. Table 42-4 in the CEC Handbook shows the relationship between duty cycle and demand factors.

Rule 42-016 Overcurrent protection — specifies the factors in determining the rating of the overcurrent protection based on the rated primary current of the welder and the allowable ampacity of the supply conductors based on Tables 1,2,3 or 4. The CEC Handbook outlines methods of calculation of duty related demand factors through Tables 42-3 and 42-4. For determining the rating of overcurrent Protection for a group of resistance welders use the factors contained in rule 42-014.

Rule 42-018 Control of resistance welders — requires that a resistance welder have a disconnecting switch or circuit breaker rated for the capacity of the supply conductors to isolate the welder from the supply circuit.

Rule 42-020 Nameplate data for resistance welders — requires data specific to the resistance welder be provided on the nameplate, including rated KVA at 50% duty cycle, maximum and minimum open-circuit secondary voltage, short circuit current, and the throat and gap setting.

In the next installment, we will be discussing Section 44 — Theatre installations

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

** Note the CEC Handbook is also published by CSA.

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.


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

 

 

 Legrand: the Adorne Collection Video Gallery 

Legrand Adorne CollectionThe adorne collection makes life simply beautiful, putting a stylishly smart finishing touch on your home. With adorne you will discover real-world inspiration for turning the ordinary into extraordinary with re-imagined switches and other solutions you have to see to believe. Check out the extensive adorne video collection to learn more about adorne and the advantages in can bring to any home.

 

 

 

 

Watch the video Here

 

Changing Scene

  • Prev
ABB presented its electrification solutions that will allow customers to take full advantage of the ...
Electricity Human Resources Canada has introduced a new Board of Directors, effective as of their ...
Jacques Fiset, the new president of the EFC Quebec section, told us in a recent interview that his ...
Organised by the Hong Kong Trade Development Council (HKTDC), the twin lighting shows - the  ...
A Friday night, the end of summer, the weather is mild, and 2,500 people — customers, ...
Eaton focuses on developing personable connections in every aspect. In September, our team will be ...
During the recently held IMARK Canada 2019 meeting in Niagara Falls, executives from 14 of the ...
Valard has been selected by Wataynikaneyap Power LPto provide engineering, procurement ...
The Canadian Apprenticeship Forum-Forum Canadien sur l’Apprentissage (CAF-FCA) has announced ...
Electricity Human Resources Canada has announced this year's keynote speakers for Agents of Change ...

Green PlugndriveThe Government of Quebec, Ingka Group (IKEA), City of Madison and several other industry and organization innovators have pledged to join CALSTART’s Global Commercial Vehicle Drive to Zero (Drive to Zero) program. 

“By joining the Drive to Zero pledge, Québec is committing to share its transportation electrification knowledge and expertise and coordinate its efforts with those of all partners to make zero-emission technology commercially viable by 2025 in the heavy vehicle sector...

 

Read More

 

 

 

Latest Articles

  • Prev
IDEAWORKS engages undergraduate students and hires co-op students in Mohawk’s Energy and ...
Pick up a newspaper or scan your preferred electronic newsfeed and you’ll likely see a series ...
Britech Corp, one of Canada’s largest heating cable companies has signed a formal agreement ...
Electrical enclosures serve to protect electrical devices from adverse environmental influences, ...

Humber CollegeLike many higher education institutions, Humber College is committed to sustainability. But at Humber, they take that commitment to the highest level. The Toronto college instills sustainability across every facet of the school and has had numerous accomplishments from their projects and partnerships that link community engagement and academics. One impressive result is that Humber has been named one of Canada's greenest employers for four consecutive years (2016-2019).

 

 

Read More

 

 

Tools for the Trade

  • Prev
  IDEAL Industries has introduced Combination Drill Taps to its tool lineup. Combining the ...
  Stripping and crimping device, 100 - 240 V input voltage, for insulated ferrules with a ...
Professional all-in-one cutter/stripper for coaxial and twisted pair cables     ...
  Klein Tools' Coax Explorrer 2 tests coaxial cable and maps up to 4 locations   ...
  Ideal Industries' T-14 wire stripper s are ideal for all professionals working within the ...
  The ATS850 conveyor eliminates all types of electro static discharge requirements. ...
  Lorik Tool & Automation has the experience and ability to manufacture a variety of ...
  Ideal Industries' 26 piece insulated Journeyman kit is ideal for new electricians or for ...
  Klein Tools Deluxe Fish Rod Set comes in 19 pieces that when assembled can fish wire and ...
  BendWorks Software was designed to help electrical contractors adopt this new process ...

beckhoff CU81The new CU81xx uninterruptible power supply (UPS) series is designed for universal use in the field. With flexible and cost-saving connection options including One Cable Technology (OCT) for uninterruptible power supply (UPS-OCT), the CU81xx series is suitable for a broad range of applications. This includes connection to the entire range of Beckhoff components – in particular the Industrial, Panel and Embedded PCs – as well as third-party products. In combination with the Beckhoff Industrial PCs (IPCs), particularly efficient cabling is possible with just one cable for 24 V supply and communication through UPS-OCT.

 

Read More

 

 

LYTSwitch DriversPower Integrations announced new high-power-density members of its LYTSwitch™-6 family of safety-isolated LED-driver ICs for smart-lighting applications. The new ICs with PowiGaN™ technology enable designs that deliver up to 110 W with 94% conversion efficiency using a simple, flexible flyback topology.

The high efficiency of the new LYTSwitch-6 ICs eliminates the need for heatsinks – greatly reducing ballast size, weight and cooling airflow requirements. The 750 V PowiGaN primary switches provide very low RDS(ON) and reduced switching losses. 

 

Read More

 

 

Peers & Profiles

  • Prev
Stephanie Medeiros leads ABB Canada’s Electric Vehicle Charging Infrastructure team, as well ...
Electrical Industry Canada had the pleasure of interviewing Matt Davis of Newfoundland Power, ...
An electrician by trade, Daniel Lacovetsky is the founder and President of Powertec Electric, an ...
Mike Morneau began his professional career in graphic arts after earning a Bachelor of Technology ...
AimLite offers a vast choice of lighting lines to facilitate any lighting project’s needs. ...
John Krill has been in the energy and construction industries for 35-years, now he serves as Canem ...
Ali Heighton is the Program Coordinator for IBEW Local 37 who has found success as a young ...
Flextherm was founded in 1991 by current company President, Philippe Charron. For more than 25 ...
Ouellet Electric Heating began humbly in 1960 with Charles-Emile Ouellet, who started manufacturing ...
Justin Harris is a Programmer/Electrician for COREngineering, a New Brunswick based mechanical ...

 

Stephanie MedeirosBy Blake Marchand

Stephanie Medeiros leads ABB Canada’s Electric Vehicle Charging Infrastructure team, as well as transit bus charging in the United States and Canada. She has been with ABB in various positions for 10 years, compiling a diverse skill set that includes work all over the world.

After receiving a degree in Electrical Engineering from McGill University, Medeiros got her start in the industry out of school volunteering with the Canadian government as an electrical engineering intern, where she travelled to Peru to help improve their water treatment infrastructure. 

Read More

 

 

Copper $US Dollar price per pound

Kerrwil Publications

538 Elizabeth Street, Midland,Ontario, Canada L4R2A3 +1 705 527 7666
©2019 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