Re: [PSES] Cooling fan safety query

2013-12-16 Thread McBurney, Ian
Hello Rich; Can I suggest to the safety testing agency to disconnect or stall the fan rotor for all testing? Would this then mean the CFM rating for the cooling fan would not be required? Regards; Ian McBurney Design Compliance Engineer. Allen Heath Ltd. Kernick Industrial Estate, Penryn,

Re: [PSES] Cooling fan safety query

2013-12-16 Thread Richard Nute
Hello Ian: In my opinion, if you stalled the fan for all testing, there would be no reason to require the CFM rating. Stalling the fan would be the better course of action as this would require the fan motor to dissipate some power as well as the series resistor, thus causing more heat --

Re: [PSES] Cooling fan safety query

2013-12-16 Thread Peter Tarver
From: Richard Nute Sent: Monday, December 16, 2013 11:03 Stalling the fan would be the better course of action as this would require the fan motor to dissipate some power as well as the series resistor, thus causing more heat -- but not much -- in the equipment. My experience with small

Re: [PSES] Cooling fan safety query

2013-12-16 Thread McInturff, Gary
Stalling would like be required by the agency anyway since a typical failure is a jam or bearing failure that would lock the rotor. Gary From: Richard Nute [mailto:ri...@ieee.org] Sent: Monday, December 16, 2013 11:03 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Cooling fan safety

[PSES] Wire Nuts in Motor Junction Boxes?

2013-12-16 Thread Mike Sherman ----- Original Message -----
Can anyone: -confirm that wire nuts are not allowed in induction motor junction boxes in the EU? -provide reasons why? -suggest solutions other than permanently mounted terminal strips? I'm not finding this in IEC 60204-1, but it seems to be a common practice that IEC motors have

Re: [PSES] Wire Nuts in Motor Junction Boxes?

2013-12-16 Thread John Allen
IIRC NFPA79 is almost a clone of 60204-1 :-)John AllenCompliance with ExperienceW.London. UKSent from my FonepadMike Sherman - Original Message - msherma...@comcast.net wrote:Can anyone: -confirm that wire nuts are not allowed in induction motor junction boxes in the EU? -provide reasons

Re: [PSES] Wire Nuts in Motor Junction Boxes?

2013-12-16 Thread John Woodgate
In message 1771936259.98100.1387233101354.javamail.r...@sz0110a.emeryville.ca.mail. comcast.net, dated Mon, 16 Dec 2013, Mike Sherman - Original Message - msherma...@comcast.net writes: -confirm that wire nuts are not allowed in induction motor junction boxes in the EU? -provide

Re: [PSES] Wire Nuts in Motor Junction Boxes?

2013-12-16 Thread Pete Perkins
PSNet, There was a lot of work in the US to harmonize IEC 60204 with NFPA 79 about a decade ago. Machine manufacturers are using NFPA 79 as a proxy for 60204 since their shops and suppliers understand the requirements expressed in this way.