This is a multi-part message in MIME format.
I would recommend you provide a letter from the manufacturer (you?) instructing approximately as below. Conductor re-identification with tape is permitted by the code and better explained in the code handbook (ref 310.12). Keep in mind a disconnect device is required as in IEC 60950 and NFPA70 article 422.31.
The equipment is suitable for use at 200-240 volts supplied from either ground referenced (as in Europe) or phase to phase sources (as in North America). When connected to a supply with a grounded conductor, the blue wire is to be connected to the grounded supply conductor. When connected to a supply without a grounded supply conductor the blue wire is connected to a phase supply conductor. The blue equipment conductor should be re-identified using electrical tape as black, red or another phase identifying color. Bob Johnson ITE Safety From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Tuesday, June 03, 2003 11:57 AM To: [email protected] Subject: Wire Colors I have a customer that wants to remove the power plug (and IEC 309 style) from our equipment and connect the wires to a power distribution system beneath the computer floor. This distribution system uses an IEC style "din rail" type of barrier strip where one inserts the bare wire into a hole and tightens two screws to affix the wire. My device is rated 200-240V single phase. When the plug is removed you have a blue, brown and green/yellow conductor. The power source is a 208V leg (two phase?) drop with two black wires. The electrician refuses to connect the blue (neutral) wire from the power cord to a black (phase) wire. How can I resolve this. Regardless of whether we are talking blue/brown or black/white, the white and blue are identified as neutral. Because we allow 200-240V single phase this does not preclude the use of 208V phase to phase input. Suggestions/Comments Thanks Rick Busche Evans & Sutherland This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstcTitle: RE: Wire Colors
I would recommend you provide a letter from the manufacturer (you?)
instructing approximately as below. Conductor re-identification with tape is
permitted by the code and better explained in the code handbook (ref
310.12). Keep in mind a disconnect device is required as in IEC 60950 and
NFPA70 article 422.31.
The equipment is suitable for use at 200-240 volts supplied from either
ground referenced (as in Europe) or phase to phase sources (as in North
America).
When connected to a supply with a grounded conductor, the blue wire is to be
connected to the grounded supply conductor.
When connected to a supply without a grounded supply conductor the blue wire
is connected to a phase supply conductor. The blue equipment conductor
should be re-identified using electrical tape as black, red or another phase
identifying color.
Bob Johnson
ITE Safety
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of [email protected]
Sent: Tuesday, June 03, 2003 11:57 AM
To: [email protected]
Subject: Wire Colors
I have a customer that wants to remove the power plug (and IEC 309
style) from our equipment and connect the wires to a power distribution
system beneath the computer floor. This distribution system uses an IEC
style "din rail" type of barrier strip where one inserts the bare wire
into a hole and tightens two screws to affix the wire.
My device is rated 200-240V single phase. When the plug is removed you
have a blue, brown and green/yellow conductor. The power source is a
208V leg (two phase?) drop with two black wires. The electrician refuses
to connect the blue (neutral) wire from the power cord to a black
(phase) wire. How can I resolve this. Regardless of whether we are
talking blue/brown or black/white, the white and blue are identified as
neutral. Because we allow 200-240V single phase this does not preclude
the use of 208V phase to phase input.
Suggestions/Comments
Thanks
Rick Busche
Evans & Sutherland
-------------------------------------------
This message is from the IEEE EMC Society Product Safety
Technical Committee emc-pstc discussion list.
Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/
To cancel your subscription, send mail to:
[email protected]
with the single line:
unsubscribe emc-pstc
For help, send mail to the list administrators:
Ron Pickard: [email protected]
Dave Heald: [email protected]
For policy questions, send mail to:
Richard Nute: [email protected]
Jim Bacher: [email protected]
Archive is being moved, we will announce when it is back on-line.
All emc-pstc postings are archived and searchable on the web at:
http://www.ieeecommunities.org/emc-pstc
<<attachment: Robert_Johnson.vcf>>
