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Page 5 of 33

Report Reference No.: 086-2101101501-000

TÜV SÜD Hong Kong Ltd.

 Test Report National and Group Differences for IEC 60950-1 2

nd

 Ed. Rev. 01 / 2010-04

2.7.1

Suitable NEC/CEC branch circuit protection
rated at the maximum circuit rating is required
for all standard supply outlets and receptacles
(such as supplied in power distribution units) 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 special transformer overcurrent
protection.

N/A

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.

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.

N/A

3.2.1.2 

Equipment connected to a centralized d.c. power
system, and having one pole of the DC mains
input terminal connected to the main protective
earthing terminal in the equipment, is required to
comply with special earthing, wiring, marking and
installation instruction requirements.

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.

N/A

3.2.5

Power supply cords are required to be no longer
than 4.5 m in length.

Flexible power supply cords are required to be
compatible with Tables 11 and 12 of the CEC
and Article 400 of the NEC.

N/A

3.2.9

Permanently connected equipment is required to
have a suitable wiring compartment and wire
bending space.

N/A

3.3

Wiring terminals and associated spacings for
field wiring connections shall comply with CSA
C22.2 No. 0.

N/A

3.3.3

Wire binding screws are not permitted to attach
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 Canadian/US wire gauge sizes, rated
125 percent of the equipment rating, and be
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).

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.

N/A

Page 6 of 33

Report Reference No.: 086-2101101501-000

TÜV SÜD Hong Kong Ltd.

 Test Report National and Group Differences for IEC 60950-1 2

nd

 Ed. Rev. 01 / 2010-04

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.

N/A

4.3.12

The maximum quantity of flammable liquid
stored in equipment is required to comply with
NFPA 30.

N/A

4.3.13.5 

Equipment with lasers is required to meet the
Canadian Radiation Emitting Devices Act, REDR
C1370 and/or Code of Federal Regulations 21
CFR 1040, as applicable.

N/A

4.7

For computer room applications, automated
information storage systems with combustible
media greater than 0.76 m

3

 (27 cu ft) 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

2

  (10 sq ft) or a single dimension greater than

1.8 m  (6 ft) 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.

N/A

Annex H  Equipment that produces ionizing radiation is

required to comply with the Canadian Radiation
Emitting Devices Act, REDR C1370 and/or Code
of Federal Regulations, 21 CFR 1020, as
applicable.

N/A

Page 7 of 33

Report Reference No.: 086-2101101501-000

TÜV SÜD Hong Kong Ltd.

 Test Report National and Group Differences for IEC 60950-1 2

nd

 Ed. Rev. 01 / 2010-04

OTHER DIFFERENCES
The following key national differences are based on requirements other than national regulatory
requirements.
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
(Canadian and/or U.S.) component or material
standard 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
circuits), 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,  switches
(including interlock switches), thermal cutoffs,
thermostats, (multi-layer) transformer winding
wire, transient voltage surge suppressors, tubing,
wire connectors, and wire and cables.

Critical components are IEC
certified. See list of critical
components in main CB report.

P

1.6.1.2 

A circuit for connection to the DC Mains Supply
is classified as either a SELV Circuit, TNV-2
Circuit or Hazardous Voltage Circuit depending
on the maximum operating voltage of the supply.
This maximum operating voltage shall include
consideration of the battery charging “float
voltage” associated with the intended supply
system, regardless of the marked power rating of
the equipment.

N/A

2.3.1

For TNV-2 and TNV-3 circuits with other than
ringing signals and with voltages exceeding 42.4
Vpeak 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.

N/A

2.3.2.1 

In the event of a single fault between TNV and
SELV circuits, the limits of 2.2.3 apply to SELV
Circuits and accessible conductive parts.

N/A

2.6.3.4 

Protective bonding conductors of non-standard
protective bonding constructions (e.g., printed
circuit traces) may be subjected to the additional
limited short circuit test conditions specified.

N/A

4.2.8.1 

Enclosures around CRTs with a face diameter of
160 mm or more are required to reduce the risk
of injury due to the implosion of the CRT.

N/A

Page 8 of 33

Report Reference No.: 086-2101101501-000

TÜV SÜD Hong Kong Ltd.

 Test Report National and Group Differences for IEC 60950-1 2

nd

 Ed. Rev. 01 / 2010-04

4.2.11

For equipment intended for mounting on racks
and provided with slide/rails allowing the
equipment to slide away from the rack for
installation, service and maintenance, additional
construction, performance and marking
requirements are applicable to determine the
adequacy of the slide/rails.

N/A

4.3.2

Equipment with handles is required to comply
with special loading tests.

N/A

5.1.8.3 

Equipment intended to receive
telecommunication ringing signals is required to
comply with a special touch current
measurement tests.

N/A

5.3.7

During abnormal operating testing, if a circuit is
interrupted by the opening of a component, the
test shall be repeated twice (three tests total)
using new components as necessary.

N/A

6.4

Equipment intended for connection to
telecommunication network outside plant cable is
required to be protected against overvoltage
from power line crosses in accordance with 6.4
and Annex NAC.

N/A

M.2

Continuous ringing signals up to 16 mA only are
permitted if the equipment is subjected to special
installation and performance restrictions.

N/A

Annex
NAD

Equipment connected to a telecommunication
and cable distribution networks and supplied with
an earphone intended to be held against, or in
the ear is required to comply with special
acoustic pressure requirements.

N/A

Annex
NAF

Document (paper) shredders likely to be used in
a home or home office (Pluggable Equipment
Type A plug configuration) are required to
comply with additional requirements, including
markings/instructions, protection against
inadvertent reactivation of a safety interlock,
disconnection from the mains supply (via
provision of an isolating switch), and protection
against operator access (accessibility determined
via new accessibility probe & probe/wedge).

N/A