Nick I concur in the information you have already been given. In addition I
would like to add from an EMI / EMC standpoint a hinged panel creates several
points of vulnerability. Your EMC testing cycle may be extended because the
your system may need to be tested with the door open and closed. Your ground
impedance seen by the door will be different between open and closed. I would
ask the mechanical designer if that is the hill they want to die on. There is
usually a better way than mounting active components on the door.
Fred Townsend
DC to Light
Momcilovic, Nick (GE Healthcare) wrote:
You first need to understand the basis for the claim of non-compliance.
What
clause of what standard, code or regulation is being violated. This is the
first piece of information you need in order to investigate the claim. If you
can find that and report back, I am sure someone on this forum can help you
out further.
Regards,
Nick
________________________________
From: [email protected] [mailto:[email protected]] On Behalf Of John
Cochran
Sent: Monday, December 21, 2009 4:52 PM
To: [email protected]
Subject: Electrical components on hinged panels
Do you know if there is a CE compliance issue with attaching electrical
components to a hinged door? For ease of construction, we often attach
components to the access door of our industrial control panel enclosures. UL
has evaluated our construction methods and certified us a UL508 Panel Shop.
Criteria is that a solid earth ground is attached to the door, and all
electrical cables are protected against damage. We are being told by a
customer that electrical components are never allowed on a door, in compliance
with CE. If UL finds it acceptable, I am not sure why it would be
unacceptable for Europe. I have seen many enclosures in Europe with
electrical components on a removable panel or door. Is the inspector
exercising personal preference, or is there a compliance standard that backs
up this decision to reject our wiring practices?
Thanks,
John Cochran
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