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Order No.  23172 

 

 
 

 

 

The following is a summary of the key national differences based on 
national regulatory requirements, such as the National Electrical Code 
(NEC) ANSI/ NFPA 70-1999, which are referenced in legislation and 
which form the basis for the rules and practices followed in the 
electrical and building installations. The bi-national standard referenced 
above should be consulted for further details on the national differences 
summarized below. 

1.1.1 

All equipment is to be designed to allow 
installations in accordance with the National 
Electrical Code (NEC), ANSI/NFPA 70, and, 
unless marked or otherwise identified, the 
standard for the Protection  of Electronic 
Computer/Data -Processing Equipment, 
ANSI/NFPA 75.  

Class III equipment. 

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.  
For length 3.05m 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. 

Class III equipment. 

1.7.1 

Equipm ent for use on 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.  
A voltage rating that exceeds an attachment 
plug cap rating is only permitted if it does not 
e xceed 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. 

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.  

No such fuse used. 

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Order No.  23172 

 

2.7.1 

Suitable NEC branch circuit protection 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 V or more, and rated 10 kVA or 
more, require transformer overcurrent 
protection. 

Class III equipment. 

3.2 

Wiring methods (terminals, leads etc.) used for 
the connection of the equipment to the mains 
shall be  in accordance with the NEC.  

Class III equipment. 

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. 

3.2.3 

Permanent connection of equipment to the 
mains supply by a power supply cord is not 
permitted.  

Not permanently connected 
equipment. 

3.2.5 

Power supply cords are required to be no 
longer than 4.5m in length. 
Flexible power supply cords are required to be 
compatible with Article 400 o f the NEC.  

Class III equipment. 

3.2.8 

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

Not permanently connected 
equipment. 

3.3 

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

Class III equipment. 

3.3.3 

Wire binding screws are not permitted to attach 
conductors larger than 10 AWG (5.3mm

2

).  

No conductors larger than 10 AWG. 

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).   

Class III equipment. 

3.4.2 

Motor control devices are required for co rd-
connected equipment with a motor if the motor 
(a) has a nominal voltage rating greater than 
120 V, (b) is rated more than 12 A, or (c) is 
rated more than 1/3hp (locked rotor current 
over 43 A).  

No such motors in the equipment. 

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 provided. 

3.4.10 

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 in the equipment. 

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Order No.  23172 

 

4.3.12 

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

No flammable liquids within the 
equipment. 

4.3.13 

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

No lasers, LED’s defused type. 

4.7.1 

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 e xtended 
discharge. 

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

4.7.3.1 

For computer room applications, enclosures 
with 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. 

The equipment has no combustible 
material greater than 0.93m2 or 
single dimension greater than 1.8m. 

Annex H  

Equipment that produces ionizing radiation is 
required to comply with Code of Federal 
Regulations, 21 CFR 1020 and Canadian 
Radiation Emitting Devices Act, REDR C1370. 

The equipment does not produce 
ionizing radiation. 

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Order No.  23172 

 

 

 

1.5.1 

Some components and materials associate d 
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.  
These components include:  
attachment plugs, cathode ray tubes, circuit 
breakers, communication circuit accessories, 
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   

All critical components are IEC, UL 
or CSA certified. See list of critical 
components in main CB report 
(§1.5.01).  

2.3.1 

For TNV-2  and TNV-3 circuits with other than 
ringing signals and with voltages exceeding 
42.4 Vp or 60 Vdc, 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 dc under normal operating 
conditions. 

No TNV circuitry.  

2.6.3.3 

When subject to impedance testing, protective 
earthing and bonding is required to be tested 
subject per the specified test conditions that 
originate in CSA C22.2 No. 0.4. 

Class III equipment. 

4.2.8.1 

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

No CRTs in the equipment.