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.

 

 

Changing Scene

  • Prev
  IMARK Canada has announced that Jim Taggart has been appointed as company ...
  After 31 years of service with Rexel Canada, Rachelle Caron, General Manager, Westburne ...
  With a growing demand for non-polluting, energy efficient vehicles, ElectraMeccanica ...
  Mark Lloyd and the Board of Directors of the Electrical Contractors Association of ...
Rittal Systems Canada, the world’s largest and most trusted manufacturer of enclosures, ...
  CNBC has announced it has teamed up with a leader in digital transformation of energy ...
  Stephen Welby has been hired as IEEE’s next executive director and chief operating ...
  Schneider Electric has announced that Susan Uthayakumar will become Country ...
  Electro-Federation Canada (EFC) and its members are proud to support Canadian university ...
  In the context of the energy transition currently unfolding where reducing greenhouse gas ...

 

Electricians Provide Assistance in TD Centre's 50th Anniversary Illumination Project

Contractors Guild, Ainsworth, Symtech, Plan and ACML donated their services to temporarily reconfigure the buildings' automated lighting systems, while a crew of staff and volunteers worked to open and close blinds on over 6,000 windows across the TD Centre's five towers to create the message "Less is more or" in 100-foot-tall lights.

A media statement called it the largest public art project of its kind undertaken anywhere in the world.

Read more: Electricians Provide Assistance...

 

Codes and Regulations Brought to You by the CSA Group

  • Prev
In this article: Section 58 — Passenger Ropeways and Similar Equipment. Rule 58-000 ...
  Unauthorized CSA Group certification marks have been found on wiring by Triumph Cable ...
In this article: Section 52 — Diagnostic imaging installations. The CE code is a ...
In this article: Section 46 — Emergency Power Supply, Unit Equipment, Exit Signs, and ...
  In this article: Section 44 — Theatre Installations. The CE Code is a ...
CSA has published C22.2 No. 60947-7-3, the harmonized standard for low-voltage switchgear and ...
  Electric welders. The CE Code is a comprehensive document. Sometimes it can seem ...
  In this article: Section 40 — Electric cranes and hoists. The CE Code is a ...

CSA

 

By William (Bill) Burr

In this article: Section 56 — Optical fibre cables. Section 56 is a supplementary or amendatory section of the code and applies to the installation of optical fibre cables in conjunction with all other electrical systems. Rule 56-002 provides a special terminology definition for an Optical Fibre Cable — a cable consisting of one or more optical fibres that transmits modulated light for the purpose of control, signalling or communications.

Rule 56-102 outlines that there are three types of optical fibre cables.



Tools for the Trade

  • Prev
  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 ...
  This new lock box is ideal for group lockout situations with multiple isolation points ...

Latest Articles

Has no content to show!

Wind Farm

 

Wind technicians have been working to keep Canada’s turbines turning for a long time now.

TransAlta’s Cowley Ridge Wind Farm was one of the first commercial facilities in the country with the original technicians back in 1993 describing their experiences of being “up so high” and that “there was nothing like it.”

Sitting on 25 meter tall lattice work towers, these machines were less than a third of the height of most tubular wind turbine towers today. However, many of the same skills learned on these first sites are still relevant today even though the technology has certainly progressed.

Read More: The Road Behind and the Road Ahead... 

 

 

 

Peers & Profiles

  • Prev
Total Electrical Solutions was founded in 2013 by Jeremy Herrington in Quispamsis, on the outskirts ...
Andrew MacLeod is a territory sales manager with Leviton Manufacturing of Canada in British ...
  Floyd Lau founded Amptek Technologies in 2002 as an end to end engineering design ...
Mike Marsh, President and CEO of SaskPower, has been a leading figure in Saskatchewan’s ...
Gordon MacDonald is a cheerful, driven individual who loves to be challenged, a trait that suits ...
  Most of us have a difficult enough time managing one job and a home life. However, some ...
  Since 2012 Barnstormer has advanced the abilities of their brewery with the installation ...
  Electrical Industry Canada was recently given the unique opportunity to see ...
  Vickery Electric has been providing electrical services to the Whitby area since 1923, ...
Safety standards in the electrical industry are constantly evolving, which requires that ...

Copper $US Dollar price per pound

Gordon M

 Gordon MacDonald is a cheerful, driven individual who loves to be challenged, a trait that suits him well as a lighting specialist overseeing retrofit projects for Rexel in New Brunswick and P.E.I. He also has had a unique introduction to the field he now works in. 

Gordon was born and raised in Moncton, New Brunswick and has lived there for most of his life. He has an incredibly busy home life that extends to his children, stepchildren and grandchildren. Beyond family life he enjoys “playing guitar and piano, going target shooting, cooking BBQ, trying new foods and learning new things.”

How One Hospital Is Improving Patient Care with Advanced Analytics Demand for healthcare is outstripping capacity, but Toronto’s Humber River Hospital has a solution: a digital Command Centre powered by GE’s Wall of Analytics. As populations grow and age, many hospitals are being stretched past their limits. Rather than apply temporary or partial fixes to address the challenges that underlie this busy, acute care hospital, Toronto’s Humber River Hospital has chosen to implement a holistic, state-of-the-art hospital command centre that will enable it to achieve radical gains in quality and efficiency.

The hospital partnered with GE Healthcare Partners to conceive, design and build the new 4,500 square-foot command centre, a cornerstone of which will be GE’s Wall of Analytics that processes real-time data from multiple source systems across the hospital.

Read more: How One Hospital is ...

 

Kerrwil Publications

538 Elizabeth Street, Midland,Ontario, Canada L4R2A3 +1 705 527 7666
2016 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