SIST EN 302 999 V1.2.1:2013

• Abstract:

  The present document contains safety requirements for the erection of information technology installations with remote power feeding at an operating a.c. voltage exceeding 50 V (rms value) or an operating d.c. voltage exceeding 120 V, conductor to conductor and/or conductor to earth. It applies in addition to EN 60950-1 [3] and EN 60950-21 [4] and contains terms, requirements and tests. If special standards are applicable for installations and parts of installations these will take precedence; for example EN 60950-1 [3] and EN 60950-21 [4].

• Status: Published
• Public Enquiry End Date: 30-Sep-2012
• Publication Date: 14-Apr-2013
• ICS: 35.200 - Interface and interconnection equipment
• Technical Committee: SPN - Services and Protocols for Networks
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 04-Apr-2013
• Due Date: 09-Jun-2013
• Completion Date: 15-Apr-2013
• Ref Project: ETSI EN 302 999 V1.2.1 (2013-03) - Safety; Remote Power Feeding Installations; Safety requirements for the erection and operation of information technology installations with remote power feeding

Overview

SIST EN 302 999 V1.2.1:2013 sets out comprehensive safety requirements for the installation and operation of information technology (IT) installations equipped with remote power feeding. The standard applies specifically to IT installations operating above 50 V AC (rms) or 120 V DC, addressing conductor-to-conductor and conductor-to-earth scenarios. It complements the foundational safety expectations outlined in EN 60950-1 and EN 60950-21 by covering unique hazards, operational procedures, labeling, and testing associated with remote power feeding systems. Ensuring compliance with this standard is fundamental for organizations deploying or maintaining remotely powered telecommunications infrastructure, particularly where higher voltages introduce elevated safety risks.

Key Topics

• Scope and Applicability

  • Covers IT installations with remote power feeding above specified voltage thresholds
  • Supplements existing standards (EN 60950-1, EN 60950-21)
  • Applies to erection, operation, and maintenance of these installations

• Safety Requirements

  • Restricted access: Equipment must be housed in locations with limited access to prevent unauthorized interference
  • Automatic shutoff: Voltage sources with limited output currents must reliably disconnect when limits are exceeded
  • Monitoring: Systems must detect faults or imbalances and alert operational staff
  • Protection against electrical hazards: Construction must prevent risk of shock or power-related injury

• Labeling and Identification

  • Cables and equipment must be continuously labeled with safety symbols, including indication of remote power presence and hazardous voltage
  • Isolation points must be clearly marked to prevent mix-ups between different remote power circuits

• Operational Instructions

  • Comprehensive safety instructions must be available at installation sites
  • Only trained or qualified personnel may carry out work on remote power feeding circuits

• Testing

  • Functions such as automatic shutoff, monitoring, and protective measures must be verified via visual inspections and type testing

Applications

SIST EN 302 999 V1.2.1:2013 is essential for organizations involved in the installation, operation, and maintenance of remotely powered IT and telecommunications infrastructure. Key applications include:

• Telecommunication Networks

  • Central offices and data centers using remote power to supply repeaters, distribution frames, or transmission equipment
  • Underground and aerial cable systems, particularly where power is supplied over long distances

• Public and Private Utility Infrastructure

  • Network providers deploying remote power to maintain system reliability and performance across dispersed geographical regions

• Data Centers and Server Farms

  • Facilities utilizing centralized remote power solutions for IT racks and networking devices

By following these safety requirements, organizations reduce risk of injury, service interruption, and equipment damage associated with high-voltage remote feeding systems.

Related Standards

To ensure a holistic approach to safety and compliance, consider these related standards:

• EN 60950-1: Information technology equipment - Safety - Part 1: General requirements
• EN 60950-21: Information technology equipment - Safety - Part 21: Remote power feeding
• EN 60417-1: Graphical symbols for use on equipment
• EN 60900: Live working - Hand tools for use up to 1000 V AC and 1500 V DC
• ITU-T Directives & Recommendation K.10: Protection of telecommunication lines against harmful effects from electric power and electrified railway lines

Adhering to SIST EN 302 999 V1.2.1:2013 and associated standards fosters safer and more reliable operation of modern IT and telecommunications systems utilizing remote power feeding.

Keywords: SIST EN 302 999, remote power feeding, IT installations, telecommunications safety requirements, high voltage, information technology, cable labeling, EN 60950-1, EN 60950-21, electrical safety.

Draft ETSI EN 302 999 V1.2.0 (2012-06)

European Standard
SAFETY;
Remote Power Feeding Installations;
Safety requirements for the erection and operation
of information technology installations
with remote power feeding
2 Draft ETSI EN 302 999 V1.2.0 (2012-06)

Reference
REN/SAFETY-00008
Keywords
control, interface, management, power, remote,
requirements, safety, system
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.

© European Telecommunications Standards Institute 2012.
All rights reserved.
TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
TM
3GPP and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI
3 Draft ETSI EN 302 999 V1.2.0 (2012-06)
Contents
Intellectual Property Rights . 4
Foreword . 4
1 Scope . 5
2 References . 5
2.1 Normative references . 5
2.2 Informative references . 5
3 Definitions and abbreviations . 6
3.1 Definitions . 6
3.2 Abbreviations . 7
4 Limits . 7
4.1 Permitted limit values in maintenance range . 7
4.2 Equipment with which limit values are exceeded according to clause 4.1 . 7
5 General requirements . 7
6 Requirements on equipment and lines . 8
7 Requirements on operating instructions . 9
8 Recommendation of operating instructions (informative). 9
History . 11

ETSI
4 Draft ETSI EN 302 999 V1.2.0 (2012-06)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://ipr.etsi.org).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This draft European Standard (EN) has been produced by ETSI Technical Committee Telecommunications Equipment
Safety (Safety), and is now submitted for the Public Enquiry phase of the ETSI standards Two-step Approval
Procedure.
Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa
Date of withdrawal of any conflicting National Standard (dow): 6 months after doa

ETSI
5 Draft ETSI EN 302 999 V1.2.0 (2012-06)
1 Scope
The present document contains safety requirements for the erection of information technology installations with remote
power feeding at an operating a.c. voltage exceeding 50 V (rms value) or an operating d.c. voltage exceeding 120 V,
conductor to conductor and/or conductor to earth. It applies in addition to EN 60950-1 [3] and EN 60950-21 [4] and
contains terms, requirements and tests.
If special standards are applicable for installations and parts of installations these will take precedence; for example
EN 60950-1 [3] and EN 60950-21 [4].
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
reference document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are necessary for the application of the present document.
[1] CENELEC EN 60417-1 (1999): "Graphical symbols for use on equipment - Part 1: Overview and
application".
[2] CENELEC EN 60900 (2004): "Live working - Hand tools for use up to 1 000 V a.c. and 1 500 V
d.c".
[3] CENELEC EN 60950-1: "Information technology equipment - Safety - Part 1: General
requirements".
[4] CENELEC EN 60950-21: "Information technology equipment - Safety - Part 21: Remote power
feeding".
[5] ITU-T Directives concerning the protection of telecommunication lines against harmful effects
from electric power and electrified railway lines (volume IV).
[6] ITU-T Recommendation K.10: "Low frequency interference due to unbalance about earth of
telecommunication equipment".
2.2 Informative references
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
Not applicable.
ETSI
6 Draft ETSI EN 302 999 V1.2.0 (2012-06)
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions given in EN 60950-1 [3],
EN 60950-21 [4] and the following apply:
load power-fed point: load power-fed point extracts electric power from the remote power feeding circuits via its
remote power feeding equipment
remote power feeding: supply of electric power in the form of direct or alternating current to information technology
installations through cables of the associated telecommunication line
remote power feeding cables: cables of a telecommunication line which are used for remote power feeding and may at
the same time be telecommunication cables
NOTE: They are components of the information technology installation.
remote power feeding circuit: circuit which is established by interconnecting remote power feeding devices and cables
to form a functional entity
NOTE: See also RFT circuit (remote feeding telecommunication circuit), RFT-C circuits and RFT-V circuits
according to EN 60950-21 [4].
remote power feeding devices: devices used for remote power feeding, e.g. to supply or extract electric power
remote power feeding equipment: equipment from which the electric power necessary for the remote power feeding
of information technology installations is extracted
NOTE 1: It is a component of the information technology installation.
NOTE 2: For information technology equipment see EN 60950-1 [3].
remote power feeding point: remote power feeding point supplies remote power feeding circuits with electrical current
via its remote power feeding equipment
remote power feeding section: part of remote power feeding circuits located between a remote power feeding point
and the immediately following power-fed point, or between two adjacent power-fed points
RFT-C circuit: RFT circuit which is so designed and protected that under normal operating conditions and single fault
conditions, the currents in the circuit do not exceed defined values
NOTE: See EN 60950-21 [4].
RFT-V circuit: RFT circuit which is so designed and protected that under normal operating conditions and single fault
conditions, the voltages are limited and the accessible area of contact is limited
NOTE: See EN 60950-21 [4].
type of remote power feeding: electrical operating mode of the remote power feed in a remote power feeding circuit. It
is specified by particular characteristics of the circuit configuration and power feeding method. A distinction is made in
particular between the following ones:
• a.c. remote power feeding: power-fed points receive an a.c. supply;
• d.c. remote power feeding: power-fed points receive a d.c. supply;
...

Final draft ETSI EN 302 999 V1.2.0 (2013-01)

European Standard
Safety;
Remote Power Feeding Installations;
Safety requirements for the erection and operation
of information technology installations
with remote power feeding
2 Final draft ETSI EN 302 999 V1.2.0 (2013-01)

Reference
DEN/SAFETY-00008
Keywords
control, interface, management, power, remote,
requirements, safety, system
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.

© European Telecommunications Standards Institute 2013.
All rights reserved.
TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
TM TM
3GPP and LTE are Trade Marks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI
3 Final draft ETSI EN 302 999 V1.2.0 (2013-01)
Contents
Intellectual Property Rights . 4
Foreword . 4
1 Scope . 5
2 References . 5
2.1 Normative references . 5
2.2 Informative references . 5
3 Definitions and abbreviations . 6
3.1 Definitions . 6
3.2 Abbreviations . 7
4 Limits . 7
4.1 Permitted limit values in maintenance range . 7
4.2 Equipment with which limit values are exceeded according to clause 4.1 . 7
5 General requirements . 7
6 Requirements on equipment and lines . 8
7 Requirements on operating instructions . 9
8 Recommendation of operating instructions (informative). 9
History . 11

ETSI
4 Final draft ETSI EN 302 999 V1.2.0 (2013-01)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://ipr.etsi.org).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This final draft European Standard (EN) has been produced by ETSI Technical Committee Telecommunications
Equipment Safety (Safety), and is now submitted for the Vote phase of the ETSI standards Two-step Approval
Procedure.
Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa
Date of withdrawal of any conflicting National Standard (dow): 6 months after doa

ETSI
5 Final draft ETSI EN 302 999 V1.2.0 (2013-01)
1 Scope
The present document contains safety requirements for the erection of information technology installations with remote
power feeding at an operating a.c. voltage exceeding 50 V (rms value) or an operating d.c. voltage exceeding 120 V,
conductor to conductor and/or conductor to earth. It applies in addition to EN 60950-1 [3] and EN 60950-21 [4] and
contains terms, requirements and tests.
If special standards are applicable for installations and parts of installations these will take precedence; for example
EN 60950-1 [3] and EN 60950-21 [4].
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
reference document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are necessary for the application of the present document.
[1] CENELEC EN 60417-1 (1999): "Graphical symbols for use on equipment - Part 1: Overview and
application".
[2] CENELEC EN 60900 (2004): "Live working - Hand tools for use up to 1 000 V a.c. and
1 500 V d.c".
[3] CENELEC EN 60950-1: "Information technology equipment - Safety - Part 1: General
requirements".
[4] CENELEC EN 60950-21: "Information technology equipment - Safety - Part 21: Remote power
feeding".
[5] ITU-T Directives concerning the protection of telecommunication lines against harmful effects
from electric power and electrified railway lines (volume IV).
[6] ITU-T Recommendation K.10: "Low frequency interference due to unbalance about earth of
telecommunication equipment".
2.2 Informative references
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
Not applicable.
ETSI
6 Final draft ETSI EN 302 999 V1.2.0 (2013-01)
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions given in EN 60950-1 [3],
EN 60950-21 [4] and the following apply:
load power-fed point: load power-fed point extracts electric power from the remote power feeding circuits via its
remote power feeding equipment
remote power feeding: supply of electric power in the form of direct or alternating current to information technology
installations through cables of the associated telecommunication line
remote power feeding cables: cables of a telecommunication line which are used for remote power feeding and may at
the same time be telecommunication cables
NOTE: They are components of the information technology installation.
remote power feeding circuit: circuit which is established by interconnecting remote power feeding devices and cables
to form a functional entity
NOTE: See also RFT circuit (remote feeding telecommunication circuit), RFT-C circuits and RFT-V circuits
according to EN 60950-21 [4].
remote power feeding devices: devices used for remote power feeding, e.g. to supply or extract electric power
remote power feeding equipment: equipment from which the electric power necessary for the remote power feeding
of information technology installations is extracted
NOTE 1: It is a component of the information technology installation.
NOTE 2: For information technology equipment see EN 60950-1 [3].
remote power feeding point: remote power feeding point supplies remote power feeding circuits with electrical current
via its remote power feeding equipment
remote power feeding section: part of remote power feeding circuits located between a remote power feeding point
and the immediately following power-fed point, or between two adjacent power-fed points
RFT-C circuit: RFT circuit which is so designed and protected that under normal operating conditions and single fault
conditions, the currents in the circuit do not exceed defined values
NOTE: See EN 60950-21 [4].
RFT-V circuit: RFT circuit which is so designed and protected that under normal operating conditions and single fault
conditions, the voltages are limited and the accessible area of contact is limited
NOTE: See EN 60950-21 [4].
type of remote power feeding: electrical operating mode of the remote power feed in a remote power feeding circuit. It
is specified by particular characteristics of the circuit configuration and power feeding method. A distinction is made in
particular between the following ones:
• a.c. remote power feeding: power-fed points receive an a.c. supply;
• d.c. remote power feeding: power-fed points receive a d.c. supply;
• double-ended remote powe
...

European Standard
Safety;
Remote Power Feeding Installations;
Safety requirements for the erection and operation
of information technology installations
with remote power feeding
2 ETSI EN 302 999 V1.2.1 (2013-03)

Reference
DEN/SAFETY-00008
Keywords
control, interface, management, power, remote,
requirements, safety, system
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.

© European Telecommunications Standards Institute 2013.
All rights reserved.
TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
TM
3GPP and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI
3 ETSI EN 302 999 V1.2.1 (2013-03)
Contents
Intellectual Property Rights . 4
Foreword . 4
1 Scope . 5
2 References . 5
2.1 Normative references . 5
2.2 Informative references . 5
3 Definitions and abbreviations . 6
3.1 Definitions . 6
3.2 Abbreviations . 7
4 Limits . 7
4.1 Permitted limit values in maintenance range . 7
4.2 Equipment with which limit values are exceeded according to clause 4.1 . 7
5 General requirements . 7
6 Requirements on equipment and lines . 8
7 Requirements on operating instructions . 9
8 Recommendation of operating instructions (informative). 9
History . 11

ETSI
4 ETSI EN 302 999 V1.2.1 (2013-03)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://ipr.etsi.org).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This European Standard (EN) has been produced by ETSI Technical Committee Telecommunications Equipment Safety
(Safety).
National transposition dates
Date of adoption of this EN: 22 March 2013
Date of latest announcement of this EN (doa): 30 June 2013
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 December 2013
Date of withdrawal of any conflicting National Standard (dow): 31 December 2013

ETSI
5 ETSI EN 302 999 V1.2.1 (2013-03)
1 Scope
The present document contains safety requirements for the erection of information technology installations with remote
power feeding at an operating a.c. voltage exceeding 50 V (rms value) or an operating d.c. voltage exceeding 120 V,
conductor to conductor and/or conductor to earth. It applies in addition to EN 60950-1 [3] and EN 60950-21 [4] and
contains terms, requirements and tests.
If special standards are applicable for installations and parts of installations these will take precedence; for example
EN 60950-1 [3] and EN 60950-21 [4].
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
reference document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are necessary for the application of the present document.
[1] CENELEC EN 60417-1 (1999): "Graphical symbols for use on equipment - Part 1: Overview and
application".
[2] CENELEC EN 60900 (2004): "Live working - Hand tools for use up to 1 000 V a.c. and
1 500 V d.c".
[3] CENELEC EN 60950-1: "Information technology equipment - Safety - Part 1: General
requirements".
[4] CENELEC EN 60950-21: "Information technology equipment - Safety - Part 21: Remote power
feeding".
[5] ITU-T Directives concerning the protection of telecommunication lines against harmful effects
from electric power and electrified railway lines (volume IV).
[6] ITU-T Recommendation K.10: "Low frequency interference due to unbalance about earth of
telecommunication equipment".
2.2 Informative references
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
Not applicable.
ETSI
6 ETSI EN 302 999 V1.2.1 (2013-03)
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions given in EN 60950-1 [3],
EN 60950-21 [4] and the following apply:
load power-fed point: load power-fed point extracts electric power from the remote power feeding circuits via its
remote power feeding equipment
remote power feeding: supply of electric power in the form of direct or alternating current to information technology
installations through cables of the associated telecommunication line
remote power feeding cables: cables of a telecommunication line which are used for remote power feeding and may at
the same time be telecommunication cables
NOTE: They are components of the information technology installation.
remote power feeding circuit: circuit which is established by interconnecting remote power feeding devices and cables
to form a functional entity
NOTE: See also RFT circuit (remote feeding telecommunication circuit), RFT-C circuits and RFT-V circuits
according to EN 60950-21 [4].
remote power feeding devices: devices used for remote power feeding, e.g. to supply or extract electric power
remote power feeding equipment: equipment from which the electric power necessary for the remote power feeding
of information technology installations is extracted
NOTE 1: It is a component of the information technology installation.
NOTE 2: For information technology equipment see EN 60950-1 [3].
remote power feeding point: remote power feeding point supplies remote power feeding circuits with electrical current
via its remote power feeding equipment
remote power feeding section: part of remote power feeding circuits located between a remote power feeding point
and the immediately following power-fed point, or between two adjacent power-fed points
RFT-C circuit: RFT circuit which is so designed and protected that under normal operating conditions and single fault
conditions, the currents in the circuit do not exceed defined values
NOTE: See EN 60950-21 [4].
RFT-V circuit: RFT circuit which is so designed and protected that under normal operating conditions and single fault
conditions, the voltages are limited and the accessible area of contact is limited
NOTE: See EN 60950-21 [4].
type of remote power feeding: electrical operating mode of the remote power feed in a remote power feeding circuit. It
is specified by particular characteristics of the circuit configuration and power feeding method. A distinction is made in
particular between the following ones:
• a.c. remote power feeding: power-fed points receive an a.c. supply;
• d.c. remote power feeding: power-fed points receive a d.c. supply;
• double-ended remote power feeding: remote power feeding circuit has two remote power feedi
...

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.SAFETY - Remote Power Feeding Installations - Safety requirements for the erection and operation of information technology installations with remote power feeding35.200Vmesniška in povezovalna opremaInterface and interconnection equipmentICS:Ta slovenski standard je istoveten z:EN 302 999 Version 1.2.1SIST EN 302 999 V1.2.1:2013en01-maj-2013SIST EN 302 999 V1.2.1:2013SLOVENSKI
STANDARD
European Standard SIST EN 302 999 V1.2.1:2013

ETSI ETSI EN 302 999 V1.2.1 (2013-03) 2
Reference DEN/SAFETY-00008 Keywords control, interface, management, power, remote, requirements, safety, system ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
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Important notice Individual copies of the present document can be downloaded from: http://www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at http://portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http://portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media.
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ETSI ETSI EN 302 999 V1.2.1 (2013-03) 3 Contents Intellectual Property Rights . 4 Foreword . 4 1 Scope . 5 2 References . 5 2.1 Normative references . 5 2.2 Informative references . 5 3 Definitions and abbreviations . 6 3.1 Definitions . 6 3.2 Abbreviations . 7 4 Limits . 7 4.1 Permitted limit values in maintenance range . 7 4.2 Equipment with which limit values are exceeded according to clause 4.1 . 7 5 General requirements . 7 6 Requirements on equipment and lines . 8 7 Requirements on operating instructions . 9 8 Recommendation of operating instructions (informative). 9 History . 11
ETSI ETSI EN 302 999 V1.2.1 (2013-03) 4 Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http://ipr.etsi.org). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This European Standard (EN) has been produced by ETSI Technical Committee Telecommunications Equipment Safety (Safety).
National transposition dates Date of adoption of this EN: 22 March 2013 Date of latest announcement of this EN (doa): 30 June 2013 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
31 December 2013 Date of withdrawal of any conflicting National Standard (dow): 31 December 2013
ETSI ETSI EN 302 999 V1.2.1 (2013-03) 5 1 Scope The present document contains safety requirements for the erection of information technology installations with remote power feeding at an operating a.c. voltage exceeding 50 V (rms value) or an operating d.c. voltage exceeding 120 V, conductor to conductor and/or conductor to earth. It applies in addition to EN 60950-1 [3] and EN 60950-21 [4] and contains terms, requirements and tests. If special standards are applicable for installations and parts of installations these will take precedence; for example EN 60950-1 [3] and EN 60950-21 [4]. 2 References References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the reference document (including any amendments) applies. Referenced documents which are not found to be publicly available in the expected location might be found at http://docbox.etsi.org/Reference. NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee their long term validity. 2.1 Normative references The following referenced documents are necessary for the application of the present document. [1] CENELEC EN 60417-1 (1999): "Graphical symbols for use on equipment - Part 1: Overview and application". [2] CENELEC EN 60900 (2004): "Live working - Hand tools for use up to 1 000 V a.c. and
1 500 V d.c". [3] CENELEC EN 60950-1: "Information technology equipment - Safety - Part 1: General requirements". [4] CENELEC EN 60950-21: "Information technology equipment - Safety - Part 21: Remote power feeding". [5] ITU-T Directives concerning the protection of telecommunication lines against harmful effects from electric power and electrified railway lines (volume IV). [6] ITU-T Recommendation K.10: "Low frequency interference due to unbalance about earth of telecommunication equipment". 2.2 Informative references The following referenced documents are not necessary for the application of the present document but they assist the user with regard to a particular subject area. Not applicable. SIST EN 302 999 V1.2.1:2013

ETSI ETSI EN 302 999 V1.2.1 (2013-03) 6 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions given in EN 60950-1 [3], EN 60950-21 [4] and the following apply: load power-fed point: load power-fed point extracts electric power from the remote power feeding circuits via its remote power feeding equipment remote power feeding: supply of electric power in the form of direct or alternating current to information technology installations through cables of the associated telecommunication line remote power feeding cables: cables of a telecommunication line which are used for remote power feeding and may at the same time be telecommunication cables NOTE: They are components of the information technology installation. remote power feeding circuit: circuit which is established by interconnecting remote power feeding devices and cables to form a functional entity NOTE: See also RFT circuit (remote feeding telecommunication circuit), RFT-C circuits and RFT-V circuits according to EN 60950-21 [4]. remote power feeding devices: devices used for remote power feeding, e.g. to supply or extract electric power remote power feeding equipment: equipment from which the electric power necessary for the remote power feeding of information technology installations is extracted NOTE 1: It is a component of the information technology installation. NOTE 2: For information technology equipment see EN 60950-1 [3]. remote power feeding point: remote power feeding point supplies remote power feeding circuits with electrical current via its remote power feeding equipment remote power feeding section: part of remote power feeding circuits located between a remote power feeding point and the immediately following power-fed point, or between two adjacent power-fed points RFT-C circuit: RFT circuit which is so designed and protected that under normal operating conditions and single fault conditions, the currents in the circuit do not exceed defined values NOTE: See EN 60950-21 [4]. RFT-V circuit: RFT circuit which is so designed and protected that under normal operating conditions and single fault conditions, the voltages are limited and the accessible area of contact is limited NOTE: See EN 60950-21 [4]. type of remote power feeding: electrical operating mode of the remote power feed in a remote power feeding circuit. It is specified by particular characteristics of the circuit configuration and power feeding method. A distinction is ma
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