Hi Brian,

 

If no one has yet suggested it, would it be possible to send the same type of 
motor to the customer site? Use the same wiring from the building to connect to 
the motor and perform the lock rotor test. If the motor passes, then the motor 
that is already connected would most likely pass. In this way, the customer’s 
motor would not be damaged or degraded.

 

Thank-you,

 

…Richard Georgerian

HID Global

Compliance Engineer

 

From: Brian Kunde <bkundew...@gmail.com> 
Sent: Thursday, July 7, 2022 9:46 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] NRTL Marks on Industrial Pump Assemblies

 

To all. Thanks for the many comments and advice. They were most helpful.

 

Our NRTL inspector is focusing on the AC Mains driving the motor as a potential 
hazardous circuit. They want the Pump Assembly, or just the motor, to have UL 
and CSA for sales in North America. Our NRTL inspector says that evaluating 
motors in the field (Field Evaluation) is difficult for it would require a 
locked rotor test which would be impossible to do in the field and be 
potentially destructive to the motor. So these markings on the motor are 
required. 

 

We are in the process of disassembling the pump to see if the motor has these 
markings, but it is being difficult to disassemble. Still working on it.  The 
Pump Manufacturers are being unresponsive or very slow to respond to our 
requests.  

 

With the current part shortage problems, we are having a difficult time finding 
a supplier that has a product to sell us. And amongst those, we are having this 
compliance issue.  R&D is frustrated, rightfully so, and is seeking help from 
our Compliance Engineering Department.  

 

Is there a test or tests that can be done in the field that would make this 
pump assembly acceptable to the AHJ? Ultimately, we will want a pump assembly 
with the Safety Marking clearly visible from the outside so there are no issues 
in the field with AHJs, but for now we will take whatever will get the product 
shipping.  

 

 Thanks.

The Other Brian

 

On Thu, Jul 7, 2022 at 9:53 AM <lauren.cr...@lamresearch.com 
<mailto:lauren.cr...@lamresearch.com> > wrote:

Brian, 

 

I’m curious if your NRTL has made it clear for what topic the pump needs 
certification? There are many energy efficiency criteria being applied to 
industrial components of various kinds these days. I cannot bring them all to 
mind quickly, but water circulators are certainly a possibility, as well as 3 
phase induction motors. Energy efficiency compliance generally cannot be judged 
at the incorporated level. 

 

Best Regards, 

-Lauren

 

From: Brian Kunde <bkundew...@gmail.com <mailto:bkundew...@gmail.com> > 
Sent: Thursday, June 30, 2022 2:01 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG <mailto:EMC-PSTC@LISTSERV.IEEE.ORG> 
Subject: [PSES] NRTL Marks on Industrial Pump Assemblies

 


 

External Email: Do NOT reply, click on links, or open attachments unless you 
recognize the sender and know the content is safe. If you believe this email 
may be unsafe, please click on the “Report Phishing” button on the top right of 
Outlook.

 

I am confused and frustrated.  We have an industrial product that includes a 
small water recirculation tank which includes a motor/pump assembly that is 
powered by 230V/360V/460Vac 3-phase.  Our NRTL inspectors says this pump 
assembly must have UL, CSA, or equivalent. Here is a website that shows the 
type of assembly we are looking for: 

 

https://www.graymills.com/fm-series.html 
<https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.graymills.com%2Ffm-series.html&data=05%7C01%7Clauren.crane%40lamresearch.com%7Cd9bf71274ca44a02bbb008da5acae122%7C918079dbc9024e29b22c9764410d0375%7C0%7C0%7C637927978970075867%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=dbrKCO2k%2BDnZlrxRp%2FkMTz%2FR5CxV0gEFs2AYKchw86U%3D&reserved=0>
 

 

The trouble is, Graymills, Granger, Dayton, etc. doesn't provide NRTL markings 
on the pumps that meet our functional requirements.  They all say that most of 
their customers do not require these marks so they only offer a few models that 
do.  

 

How can this be? Am I missing something?  Some say that manufacturers can get 
the pumps approved as part of a certification of the entire machine, but how 
can the pump be evaluated by a system integrator who doesn't manufacture the 
pump, nor has any constructional information?  Wouldn't it HAVE to be done by 
the motor manufacturer?  

 

I keep asking our NRTL Field Inspector if he would accept such a product and 
the answer is no.  Our CSA inspector also says no; it must have CSA or 
equivalent on the motor and/or motor/pump assembly.  

 

Any suggestions?  

 

Thanks,

The Other Brian

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