crazy making by AHJ's that have no engineering knowledge.
Electric motors, certainly.
physical: pumps, any of the variety I am familiar with, have no hazards for
safety.
Even when stalled and pumping no where.
As a system, there might be a problem.
Assume that is a system approval and is custom for the situation.
ie. nuclear cooling system pumps as a collection of various parts, just might
desire an approval.
But individual parts, not so much and a system approval would not carry over to
any other approvals, unless identical. and certainly not to any component to a
system approvals.
On Friday, July 1, 2022, 09:48:45 AM EDT, MIKE SHERMAN
<msherma...@comcast.net> wrote:
Brian --
My gut is that it's reasonable to expect a UL/CSA marking on a 3-phase 460
VAC motor, but that listings for pumps are quite a bit rarer.
Are there unique hazards associated with the pump should it fail? If not,
I'd concentrate on the motor marking.
Contact me off this list-serve if you'd like to discuss more.
Mike Sherman Sherman PSC LLC Product Safety Consulting
On 06/30/2022 2:00 PM Brian Kunde <bkundew...@gmail.com> wrote:
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
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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