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.

 

 

How to select the Best Protection against Surge



Schneider ElectricEvery household requires Surge Protection Devices to protect plug strips and all-important household appliances, from higher-level surge.

Join us on Wednesday, May 27, 2020 at 1:00PM ET, to find out how Surge Protection Devices can prevent damage to important household appliances by suppressing the surge, and how to select the right one!

Login/Register to your Electrician Portal for this free 30-minute webinar. Access to more learning sessions also available.  Login/Register Now

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 ...

EIN Rittal webinar 400Rittal is putting on a free webinar for their Canadian customers discussing how IoT enabled climate control solutions can help reduce energy costs by 75%. 

Time & Date: Tuesday, May 12 at 2PM EDT

Go HERE to register

 

 

 

 

 

 

 

OntarioThe Ontario government has introduced grant funding for apprentices to purchase tools, protective equipment and clothing for their trade, along with forgiving previous loans to purchase tools. Which will be available later this year. The announcement also included support for laid off and unemployed hospitality workers.

The announcement was made by Premier Doug Ford, Christine Elliott, Deputy Premier and Minister of Health, and Monte McNaughton, Minister of Labour, Training and Skills Development.

Read More

 

 

Latest Articles

  • Prev
Many organizations are at risk of continued interruption to operations due to coronavirus and ...
It is very scary to realize that our entire world has changed so drastically with the COVID-19 ...
My feet were cold. In my haste to run out the door that night when the pager chirped and ...
It's a nearly 2,100-mile drive from his home in Newfoundland to the jobsite in western ...
As the spread of COVID-19 rapidly increases around the world, companies are beginning to prepare ...
With their new REEL-X fish tape line, Greenlee aimed to alleviate the aggravation and wasted energy ...
I once took a class where the professor would explain concepts in two ways. First, he would dive ...
A broadening of the role of luminaires and a continued focus on people and energy efficiency are ...
We are in an Age of Disruption. Extant and emerging technologies are driving significant evolution ...
Often, code users encounter situations where they find themselves at odds with the rules contained ...

Worker RiskMany of us take risks in their daily lives, such as using our cell phone while driving or exceeding the speed limits, while fortunately avoiding any potential injury and damage. We are rewarded by a certain convenience when we take risks, such as apparent time savings as well as the tacit approval of observers who do not oppose our risky behaviour.

To reduce injuries in the workplace, we must all recognize that we are accepting certain risks on a daily basis and acknowledge the factors influencing risk tolerance.

Read More

 

 

 

 

Sean SilveyBy Sean Silvey

More than 70% of workers believe there is an opportunity for more electrical safety training in the workplace, according to a January 2020 Fluke survey of 162 electrical workers. Three reasons why electricians may feel they don't get enough safety training for their jobs are because effective programs take a lot of time to set up, employees are often not engaged in the training or safety meeting, and safety isn’t talked about in a way that builds toward a strong safety program. Here’s what you can do to create a stronger training program.

Read More

 

 

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

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