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Page 93 of 99
ST-06153
IEC 60950-1 / EN 60950-1
Clause
Requirement – Test
Result – Remark
Verdict
TRF No.: IECEN60950_1A
National Differences United States of America (US)
IEC 60950-1, 1st ed.
The United States of America and Canada have
adopted a single, bi–national standard,
CAN/CSA-C22.2 No. 60950-1/UL 60950-1, First
Edition, which is based on IEC 60950-1, First
Edition. This bi–national standard should be
consulted for further details on the national
conditions and differences summarized below.
adopted a single, bi–national standard,
CAN/CSA-C22.2 No. 60950-1/UL 60950-1, First
Edition, which is based on IEC 60950-1, First
Edition. This bi–national standard should be
consulted for further details on the national
conditions and differences summarized below.
P
SPECICAL NATIONAL CONDITIONS
The following is a summary of the key national
differences based on national regulatory
requirements, such as the National Electrical
Code (NEC), ANSI/NFPA 70-2002, which are
referenced in legislation and which from the basis
for the rules and practices followed in electrical
and building installations.
differences based on national regulatory
requirements, such as the National Electrical
Code (NEC), ANSI/NFPA 70-2002, which are
referenced in legislation and which from the basis
for the rules and practices followed in electrical
and building installations.
P
Sub-Clause National Condition
1.1.1
All equipment is to be designed to allow
installation in accordance with the National
Electrical Code (NEC), ANSI/NFPA 70, the
Canadian Electrical Code (CEC), Part I,
CAN/CSA-C22.1, and when applicable, the
National Electrical Safety Code, IEEE C2. Also,
unless marked or otherwise identified, installation
is allowed per the Standard for the Protection of
Electronic Computer/Data-Processing
Equipment, ANSI/NFPA 75.
installation in accordance with the National
Electrical Code (NEC), ANSI/NFPA 70, the
Canadian Electrical Code (CEC), Part I,
CAN/CSA-C22.1, and when applicable, the
National Electrical Safety Code, IEEE C2. Also,
unless marked or otherwise identified, installation
is allowed per the Standard for the Protection of
Electronic Computer/Data-Processing
Equipment, ANSI/NFPA 75.
P
1.4.14
For Pluggable Equipment Type A, the protection
in the installation is assumed to be 20 A.
in the installation is assumed to be 20 A.
P
1.5.5
For lengths exceeding 3.05 m, external
interconnecting flexible cord and cable
assemblies are required to be a suitable cable
type (e.g. DP, CL2) specified in the NEC.
interconnecting flexible cord and cable
assemblies are required to be a suitable cable
type (e.g. DP, CL2) specified in the NEC.
For lengths 3.05 m or less, external
interconnecting flexible cord and cable
assemblies which are not types specified in the
NEC are required to have special construction
features and identification markings.
interconnecting flexible cord and cable
assemblies which are not types specified in the
NEC are required to have special construction
features and identification markings.
P
Page 94 of 99
ST-06153
IEC 60950-1 / EN 60950-1
Clause
Requirement – Test
Result – Remark
Verdict
TRF No.: IECEN60950_1A
1.7.1
Equipment for use on a.c. mains supply systems
with a neutral and more than one phase
conductor (e.g. 120/240 V, 3-wire) require a
special marking format for electrical ratings.
with a neutral and more than one phase
conductor (e.g. 120/240 V, 3-wire) require a
special marking format for electrical ratings.
A voltage rating that exceeds an attachment plug
cap rating is only permitted if it does not exceed
the extreme operating conditions in Table 2 of
CAN/CSA C22.2 No. 235, and if it is part of a
range that extends into the Table 2 “Normal
Operating Conditions.” Likewise, a voltage rating
shall not be lower than the specified “Normal
Operating Conditions,” unless it is part of range
that extends into the “Normal Operating
Conditions.”
cap rating is only permitted if it does not exceed
the extreme operating conditions in Table 2 of
CAN/CSA C22.2 No. 235, and if it is part of a
range that extends into the Table 2 “Normal
Operating Conditions.” Likewise, a voltage rating
shall not be lower than the specified “Normal
Operating Conditions,” unless it is part of range
that extends into the “Normal Operating
Conditions.”
N/A
2.5
Where a fuse is used to provide Class 2, Limited
Power Source, or TNV current limiting, it shall not
be operator-accessible unless it is not
interchangeable.
Power Source, or TNV current limiting, it shall not
be operator-accessible unless it is not
interchangeable.
N/A
2.7.1
Suitable NEC/CEC branch circuit protection rated
at the maximum circuit rating is required for all
standard supply outlets, receptacles and medium-
base or smaller lampholders if the supply branch
circuit protection is not suitable.
at the maximum circuit rating is required for all
standard supply outlets, receptacles and medium-
base or smaller lampholders if the supply branch
circuit protection is not suitable.
Power distribution transformers distributing power
at 100 volts or more, and rated 10 kVA or more,
require transformer overcurrent protection.
at 100 volts or more, and rated 10 kVA or more,
require transformer overcurrent protection.
Considered P
3.2
Wiring methods (terminals, leads, etc.) used for
the connection of the equipment to the mains
shall be in accordance with the NEC/CEC.
the connection of the equipment to the mains
shall be in accordance with the NEC/CEC.
N/A
3.2.1
Power supply cords are required to have
attachment plugs rated not less than 125 percent
of the rated current of the equipment.
attachment plugs rated not less than 125 percent
of the rated current of the equipment.
N/A
3.2.3 Permanent
connection
of equipment to the mains
supply by a power supply cord is not permitted,
except for certain equipment, such as ATMs.
except for certain equipment, such as ATMs.
The EUT is not such types
N/A
3.2.5
Power supply cords are required to be no longer
than 4.5 m in length.
than 4.5 m in length.
Flexible power supply cords are required to be
compatible with Article 400 of the NEC, and
Tables 11 and 12 of the CEC.
compatible with Article 400 of the NEC, and
Tables 11 and 12 of the CEC.
N/A
3.2.9
Permanently connected equipment is required to
have a suitable wiring compartment and wire
bending space.
have a suitable wiring compartment and wire
bending space.
N/A
Page 95 of 99
ST-06153
IEC 60950-1 / EN 60950-1
Clause
Requirement – Test
Result – Remark
Verdict
TRF No.: IECEN60950_1A
3.3
Wiring terminals and associated spacings for field
wiring connections shall comply with CSA C22.2
No. 0.
wiring connections shall comply with CSA C22.2
No. 0.
No wiring terminal
N/A
3.3.3
Wire binding screws are not permitted to attach
conductors larger than 10 AWG (5.3 mm
conductors larger than 10 AWG (5.3 mm
2
).
N/A
3.3.4
Terminals for permanent wiring, including
protective earthing terminals, are required to be
suitable for U.S./Canadian wire gauge sizes,
rated 125 percent of the equipment rating, and
specially marked when specified (1.7.7).
protective earthing terminals, are required to be
suitable for U.S./Canadian wire gauge sizes,
rated 125 percent of the equipment rating, and
specially marked when specified (1.7.7).
N/A
3.4.2 Motor
control
devices are required for cord-
connected equipment with a motor if the
equipment is rated more than 12 A, or if the motor
has a nominal voltage rating greater than 120 V,
or is rated more than 1/3 hp (locked rotor current
over 43 A).
equipment is rated more than 12 A, or if the motor
has a nominal voltage rating greater than 120 V,
or is rated more than 1/3 hp (locked rotor current
over 43 A).
No such devices
N/A
3.4.8
Vertically-mounted disconnect switches and
circuit breakers are required to have the “on”
position indicated by the handle in the up
position.
circuit breakers are required to have the “on”
position indicated by the handle in the up
position.
No such devices
N/A
3.4.11
For computer room applications, equipment with
battery systems capable of supplying 750 VA for
five minutes are required to have a battery
disconnect means that may be connected to the
computer room remote power-off circuit.
battery systems capable of supplying 750 VA for
five minutes are required to have a battery
disconnect means that may be connected to the
computer room remote power-off circuit.
N/A
4.3.12
The maximum quantity of flammable liquid stored
in equipment is required to comply with NFPA 30.
in equipment is required to comply with NFPA 30.
No such materials within the
EUT
EUT
N/A
4.3.13
Equipment with lasers is required to meet Code
of Federal Peculations 21 CFR 1040 (and the
Canadian Radiation Emitting Devices Act, REDR
C1370).
of Federal Peculations 21 CFR 1040 (and the
Canadian Radiation Emitting Devices Act, REDR
C1370).
No such devices within the EUT
N/A
4.7
For computer room applications, automated
information storage systems with combustible
media greater than 27 cubic feet are required to
have a provision for connection of either
automatic sprinklers or a gaseous agent
extinguishing system with an extended discharge.
information storage systems with combustible
media greater than 27 cubic feet are required to
have a provision for connection of either
automatic sprinklers or a gaseous agent
extinguishing system with an extended discharge.
N/A
4.7.3.1
For computer room applications, enclosures with
combustible material measuring greater than 0.9
m
combustible material measuring greater than 0.9
m
2
or a single dimension greater than 1.8 m, are
required to have a flame spread rating of 50 or
less. For other applications, enclosures with the
same dimensions require a flame spread rating of
200 or less.
less. For other applications, enclosures with the
same dimensions require a flame spread rating of
200 or less.
N/A
Page 96 of 99
ST-06153
IEC 60950-1 / EN 60950-1
Clause
Requirement – Test
Result – Remark
Verdict
TRF No.: IECEN60950_1A
Annex H
Equipment that produces ionizing radiation is
required to comply with Code of Federal
Regulations, 21 CFR 1020 (and the Canadian
Radiation Emitting Devices Act, REDR C1370).
required to comply with Code of Federal
Regulations, 21 CFR 1020 (and the Canadian
Radiation Emitting Devices Act, REDR C1370).
The EUT does not produce
ionizing radiation
ionizing radiation
N/A
OTHER DIFFERENCES
The following key national differences are based
on requirements other than national regulatory
requirements.
on requirements other than national regulatory
requirements.
P
Sub-Clause National Difference
1.5.1
Some components and materials associated with
the risk of fire, electric shock, or personal injury
are required to have component or material
ratings in accordance with the applicable national
(U.S. and Canadian) component or material
requirements.
the risk of fire, electric shock, or personal injury
are required to have component or material
ratings in accordance with the applicable national
(U.S. and Canadian) component or material
requirements.
These components include:
attachment plugs, battery packs (rechargeable
type, used with transportable equipment),
cathode ray tubes, circuit breakers,
communication circuit accessories, connectors
(used for current interruption of non-LPS circuis),
cord sets and power supply cords, direct plug-in
equipment, enclosures (outdoor), flexible cords
and cables, fuses (branch circuit), fuseholders,
ground-fault current interrupters, industrial control
equipment, insulating tape, interconnecting
cables, lampholders, limit controls, printed wiring,
protectors for communications circuits,
receptacles, solid state controls, supplementary
protectors, surge suppressors, switches
(including interlock switches), thermal cutoffs,
thermostats, transformer winding wire, tubing,
wire connectors, and wire and cables.
type, used with transportable equipment),
cathode ray tubes, circuit breakers,
communication circuit accessories, connectors
(used for current interruption of non-LPS circuis),
cord sets and power supply cords, direct plug-in
equipment, enclosures (outdoor), flexible cords
and cables, fuses (branch circuit), fuseholders,
ground-fault current interrupters, industrial control
equipment, insulating tape, interconnecting
cables, lampholders, limit controls, printed wiring,
protectors for communications circuits,
receptacles, solid state controls, supplementary
protectors, surge suppressors, switches
(including interlock switches), thermal cutoffs,
thermostats, transformer winding wire, tubing,
wire connectors, and wire and cables.
P
2.3.1
For TNV-2 and TNV-3 circuits with other than
ringing signals and with voltages exceeding 42.4
Vp or 60 Vd.c., the maximum acceptable current
through a 2000 ohm resistor (or greater)
connected across the voltage source with other
loads disconnected is 7.1 mA peak or 30 mA d.c.
under normal operating conditions.
ringing signals and with voltages exceeding 42.4
Vp or 60 Vd.c., the maximum acceptable current
through a 2000 ohm resistor (or greater)
connected across the voltage source with other
loads disconnected is 7.1 mA peak or 30 mA d.c.
under normal operating conditions.
No TNV circuit within the EUT
N/A
2.3.2
In the event of a single fault, the limits of 2.2.3
apply to SELV Circuits and accessible conductive
parts.
apply to SELV Circuits and accessible conductive
parts.
N/A
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