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Report No.   158002 

 

 

IEC 60950-1:2005 

Clause 

Requirements – Test 

Result – Remark 

Verdict

 

Canada and the United States of America have adopted a single, bi-national standard, CAN/CSA C22.2 No. 
60950-1/UL60950-1, Second Edition, which is based on IEC 60950-1, Second Edition. This bi-national 
standard should be consulted for further details on the national conditions and differences summarized 
below. 

SPECIAL NATIONAL CONDITIONS 

The following is a summary of the key national differences based on national regulatory requirements, such 
as the Canadian Electrical Code (CEC) Part and the Canadian Building Code, which are referenced in 
legislation and which form the basis for the rules and practices followed in electrical and building 
installations. 
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. 

Class III equipment 

N/A 

1.4.14 

For Pluggable Equipment Type A, the protection 
in the installation is assumed to be 20A .................

Class III equipment 

N/A 

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 CEC/NEC. .....

Class III equipment 

N/A 

 

For lengths 3.05 m or less, external 
interconnecting flexible cord and cable 
assemblies that are not types specified in the 
CEC/NEC are required to have special 
construction features and identification markings.

Class III equipment 

N/A 

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. 

Class III equipment 

N/A 

 

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 a range 
that extends into the "Normal Operating 
Conditions." 

Class III equipment 

N/A 

 

 

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Report No.   158002 

 

 

 

1.7.7 

Wiring terminals intended to supply Class 2 
outputs in accordance with CEC Part 1 or NEC 
shall be marked with the voltage rating and 
“Class 2” or equivalent.  Marking shall be located 
adjacent to the terminals and shall be visible 
during wiring. 

Not Class 2 equipment. 

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. 

Not Class 2 equipment. 

N/A 

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. 

Class III equipment 

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. 

Class III equipment 

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. 

Class III 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. 

Class III 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. 

Class III equipment 

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. 

Class III equipment 

N/A 

3.2.9 

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

Class III equipment 

N/A 

3.3 

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

Class III equipment 

N/A 

3.3.3 

Wire binding screws are not permitted to attach 
conductors larger than 10 AWG (5.3 mm2). 

Class III equipment 

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). 

Class III equipment 

N/A 

 

 

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Report No.   158002 

 

 

 

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). 

No such motors in the 
equipment. 

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. 

No disconnect switch in the 
equipment. 

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. 

No such battery capable of 
supplying 750VA. 

N/A 

 

Battery system:  ......................................................
When power-off is activated:  ................................ 

 

 

4.3.12 

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

No flammable liquids within the 
equipment. 

N/A 

 Flammable 

liquid material: ...................................... 

Flash point: ............................................................. 
Boiling point: ........................................................... 
Container material:  ................................................ 
Storage container size: ........................................... 

 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. 

No laser is used, LEDs provided 
are diffuse. 

N/A 

4.7 

For computer room applications, automated 
information storage systems with combustible 
media greater than 0.76 m3 (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. 

The equipment has no 
combustible area greater than 27 
cubic feet. 

N/A 

4.7.3.1 

For computer room applications, enclosures with 
combustible material measuring greater than 0.9 
m2  (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.  

The equipment has no 
combustible material greater 
than 0.93m

2

 or single dimension 

greater than 1.8m. 

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. 

The equipment does not produce 
ionizing radiation. 

N/A 

OTHER DIFFERENCES 
 
The following key national differences are based on requirements other than national regulatory 
requirements. 

 

 

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Report No.   158002 

 

 

 

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 or 
UL certified. See list of critical 
components in main CB report (§
1.5.1). 

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. 

The Equipment not connected to 
DC power system. 

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. 

No TNV circuitry. 

N/A 

2.3.2.1 

In the event of a single fault between TNV and 
SELV circuits, SELV Circuits and accessible 
conductive parts comply with the North American 
limits of 2.2.3. 

 N/A 

2.6.3.4 

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

Class III equipment. 

 

4.2.8.1 

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

No CRTs in the equipment. 

N/A