We have an expert on electric shock here, so I won't go further than to
say that the effect of 30 mA depends very much on how much contact area
there is, where it is and for how long contact lasts. I am surprised
that 6 mA doesn't result in nuisance tripping.
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK
On 2018-01-30 22:43, Ralph McDiarmid wrote:
Agreed, and current carry-carrying of PE and bonding of internal parts must
meet stringent UL/CSA requirements. (not mA!) It seems to me that 30mA is
close to lethal, and the GFCI outlets Listed over here are 6mA trip. (still a
painful shock)
Ralph McDiarmid
Product Compliance Specialist
Solar Business
Schneider Electric
From: John Woodgate [mailto:j...@woodjohn.uk]
Sent: Tuesday, January 30, 2018 2:30 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] GFCI vs GFPE
I don't think that is the reason recognized in Europe. The PE circuit has the
same (or similar) current-carrying capacity as the line circuit(s), so its
fault-current capacity for 30 s is very large even for a household supply. I
think the protector is there to prevent fire and to give some protection
against electric shock, although the latter is compromised so as to prevent
nuisance-tripping, which would occur if the trip were set at say 5 mA to give
much better protection.
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates http://www.woodjohn.uk
Rayleigh, Essex UK
On 2018-01-30 22:03, Kunde, Brian wrote:
I’ve recently come to understand that the 30mA Ground-Fault protectors, often
built into a circuit breaker, is intended to protect the Protective Earth
(Safety Ground) circuit in the case of a short circuit (opening the circuit
before the safety ground could be damaged. It this correct?
Here is my question. I’m evaluating a cut-off saw (5hp) which uses water to keep the blade and material cool. The manufacturer uses a 3-phase supplementary circuit breaker which includes the 30mA GFPE option. This is a very expensive part. When I asked them why they use the GFPE part, they couldn’t give me a good answer.
Would such a part be required on a 3-phase motor driven cutoff saw in either North America or Europe? What standard would dictate this?
If the only purpose of a GFPE is to protect the Ground Circuit, on products that can handle shorts without damaging the ground circuit, would a GFPE still be necessary?
Where are GFPE typically used? What industry?
Please educate me. This is a new one on me.
Thanks,
Brian
From: Doug Nix [mailto:d...@ieee.org]
Sent: Friday, January 26, 2018 2:48 PM
To: mailto:EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] JOB POSTING - ONTARIO, CANADA
PLEASE CONTACT TED TYCZKA DIRECTLY
A very notable, “high-profile” client who is seeking a Safety & Services Sales/Business Development Professional - to join their Machine Services Division - the focus of the role is to spearhead/lead the sale of Engineering Services related to “functional safety.”
The company sells safety training (workshops), machine assessment/audits, engineering design per CSA and/or TUV Safety requirements (“Regulatory Compliance”). The company also sells Remediation and Repair Services (of industrial machines) together with Service Contracts ... to customers in the aerospace, automotive, forestry, food & beverage, as well as, the packaging sectors.
The Safety & Services/Business Development Professional can work from a home office - anywhere in Ontario. A Bachelor of Science in Mechanical or Electrical Engineering, together with the sale of Machine Safeguard devices and the application of these, would be desired ... together, with some exposure to Industrial Automation and perhaps Robotics. The key is to have some knowledge of safety components, safety scanners, switches, controllers, etc. as well as machine building experience.
The employer (a very reputable, Global entity/brand) ... who provide a very competitive base salary, lucrative annual bonus/incentive program vs. results, plus monthly car allowance, Benefits, Matching RRSP + (Training, Career Opportunities and upward mobility).
They are good people, seek an ambitious self-starter who can cover sales from the “shop floor” level to the “C Suite” (Boardroom). The company have established Sales Reps across Canada ... who can work with the Safety & Services Sales Specialist ... this role requires “consultative and solutions oriented selling ability.
I will ensure absolute confidentiality. Nice opportunity with a great organization and strong, capable leadership. Thanks.
Kind professional regards,
Ted Tyczka
President
Golden Mile Management – Consulting Services
2630 Eglinton Avenue East, Toronto, Ontario M1K 2S3
Tel: (416) 266 - 4434
Email: mailto:t...@gmmcs.com
Website: http://www.gmmcs.com/
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