Dear colleagues,
I am looking for VDE approval AC disconnect box rated 10A/250VAC, outdoor
use with IP54 rating.
I would appreciate if someone can point me where to find this box. Thanks
in advance!
Regards,
Richard
_
Richard Lee
UL 1778 and EN50091-1-1 require backfeed testing which is almost identical
to capacitor discharge testing. If a UPS has approvals, there is no hazard
available(required to be less than 30VAC after 2 seconds). The test is also
done while faulting the transfer relays(this makes sure that the
Rich,
Like Doug, I've got to play the devil's advocate for a bit longer to ensure
I understand this issue once the dust settles.
I've read these sections of the CFR many times, and always interpreted them
to apply to end user equipment, as you imply. However, I am beginning to see
that this
Hello all,
I was wondering if anyone had a comment on the following: Most
uninterruptible power sources (UPS) have a unique characteristic. There exists
an energy (albeit small) on the outlet plug prongs even when the unit is not
connected to the mains supply. I have been told that it
Here's how a local Denver area OSHA inspector explained it to me...
OSHA considers worker safety to be the responsibility of the company
employing them. Electrical safety for both the facility and it's
infrastructure and the equipment connecting into it's electrical system is
the responsibility
Hi Lauren,
You may want to the manufacturer directly. They usually are cooperative and
will least give you ideas where to look if they don't have it the data.
Another place you may try is the Reliability Analysis Center at Rome , NY
Bill Jackson, CQE
QA PrgmsEng/Product Safety
Harris
RF
Hi all
I am currently upgrading my RI test frequency range and have replaced
my signal generator with a new model. I currently am using a Marconi
model 2023A. I am looking to sell this unit for $4000. If anyone is
interested please call or email me.
Thank you
Brodie C. Pedersen
Nonin
Dear Colleagues,
I am looking for failure modes and reliability information for magnetic reed
switches.
I have tried general surfing on the net. I find many sites that talk about
physics of failure and reliability but none come out an provide direct
information on reed switches.
Where can I
Has anyone reviewed Jon Curtis' work in the June 1999 issue of Conformity?
Its title is OSHA's Electrical Standards, What it Covers and What it
Doesn't. It is a very complete assessment of the laws pertaining to this
subject.
Anton (Tony) J. Nikolassy
Project Engineer, Electrical Section
We are looking for a supplier of 300 Watt PS2, PC power supplies that have PFC
(Power Correction Factor).
Here is the spec:
It must comply with: EN 60950 (safety approval required), EN 50082-1, EN
61000-3-2/3, CISPR 22 (or EN 55022).
REQUIRED RATED INPUT: 220-240VAC, 50-60Hz, 3.5A (auto ranging
Peter: We have used LISN's for testing of DC ports, and found that the
data correlates quite well to other methods, particularly the CISPR 16
voltage probe. Note that this probe may well be the required
measurement device for DC ports, depending what standard you are using
(in our case
Hi George:
So here is the challenge. Can anyone prove that 29 CFR 1900
or the NEC specifically requires ITE to meet more than some
grounding/marking requirements, or be required to be approved by
an NRTL. Proof is citing clearly stated sections obviously
applicable to typical
PSNet, including George
There are instances in which installed equipment has been reviewed
by local inspectors and required to be Listed.
In one instance a contractor was providing a complete turn-key TV
studio. He ordered the installed, cord connected equipment to be
This discussion is opening more issues than it is closing.
No one can merely skim through 29 CFR 1900 or the NEC and
find what they are looking for, so I may have missed what I
was looking for given the time that I had.
Like Doug, I cannot find a single definitive statement, or
combination
Hi Everybody
Can I ask the group to dig me out of a hole again.
I am looking for a power conditioner/voltage regulator. Preferably to
run with 110/240 volts 50/60 Hz and NRTL listed.
We used to obtain these from a company called Sola Banner which was a
division of General
Doug,
I agree entirely!
Yesterday I sent the below mail to a fellow emc-pstc groupie:
I have struggled through the OSHA webpages before, including SubPart S:
SubPart Title: Electrical - Design Safety Standards for Electrical Systems
where it does clearly say:
Approval. The conductors and
Dear Fellow Professionals,
Let me be the devil's advocate for the moment.
I normally do not like to pick apart standards,
but this one has been kicking around my mind
for years.
I will refer all to the following websites so we're
all on the same playing field.
Hello All,
I have been given a DC-DC switch mode power supply that uses 48V DC input to
test for both emissions and immunity. Can someone let me know if I am correct
to assume:
1- Can the same AC version LISN be used for DC-DC product? i.e rather than
feeding AC, I can feed 48V DC into the
George,
To add to your statements;---
It is not just cities that may require NRTL marking on equipment, but also
the insurance carriers of the various businesses where the equipment is
installed. In many cities the Fire Department inspects for NRTL markings
on business premises; they don't
Hi Fowell,
It may fall within the scope of EN 60742.
Regards
Barry Esmore
AUS-TICK
Phone: + 61 3 9886 1345
Fax: + 61 3 9884 7272
Email: bar...@melbpc.org.au
- Original Message -
From: fwhitfi...@rheintech.com
To: emc-p...@ieee.org
Sent: Monday, August 16, 1999 11:08 PM
Subject:
On Mon, 16 Aug 1999 geor...@lexmark.com wrote:
Here is my understanding of this issue relative to ITE. I post this both
to inform, and solicit comments which could improve my understanding.
The only U.S. Federal law I am aware of pertaining to product safety is
that covered in 29 CFR
Hi George:
Just a clarification and amplification or your message...
There are TWO laws that govern product safety:
1) OSHA.
Your remarks thoroughly covered this law.
2) The National Electrical Code.
This is a model building code intended for adoption by
local building
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