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Page 82 of 91 

ST-05368 

 

IEC 60950-1 / EN 60950-1 

Clause 

Requirement – Test  

Result – Remark  

Verdict 

 

TRF No.: IECEN60950_1A 

 
 
 

2.6.3.3 

When subject to impedance testing, protective 
earthing and bonding are required to be 
subjected to the additional test conditions 
specified. 

Class II 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 instructions requirements. 

 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. 

No such devices within the EUT 

N/A 

4.3.2 

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

No such devices within the EUT 

N/A 

5.1.8.3 

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

No TNV circuit within the EUT 

N/A 

6.2.1 

Enamel coating on winding wire not considered 
electrical separation unless subjected to special 
investigation. 

 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 

6.5 

Equipment connected to a telecommunications 
network and supplied with an earphone intended 
to be held against, or in the ear is required to 
comply with special acoustic pressure tests. 

 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. 

No TNV circuit within the EUT 

N/A 

 

 

 

 

Page 83 of 91 

ST-05368 

 

IEC 60950-1 / EN 60950-1 

Clause 

Requirement – Test  

Result – Remark  

Verdict 

 

TRF No.: IECEN60950_1A 

 
 
 

 

 

 

1. Supply tolerance  

Item 1.4.5 of IEC 60950 stipulates the tolerance 
of rated voltage is +6 % and –10 %, while 
GB4943-2001 makes a specification of tolerance 
of +10 % and –10 %. 

 P 

2. Power rating marking 

Item 1.7.1 of IEC 60950 does not specify 
concrete figures of markings of supply voltage 
and frequency, instead, descriptions are given by 
examples. But the examples do not include 
China’s mains voltage. GB4943-2001 stipulates 
that: 

- 

A single rated voltage shall expressed as 220 
V 

- 

When a rated voltage range is given, the 
range shall cover 220 V 

- 

When a variety voltages or rated voltage 
ranges are given, one of them shall be set as 
220 V when dispatched from the factory 

- 

Rated frequency or rated frequency range 
shall be 50 Hz or include 50 Hz 

- 

If a unit is not provided with means of direct 
connection to the AC mains supply, it need 
not be marked with any electrical rating 

 P 

3. Plate and warning marking in Chinese 

Item 1.7.12 of GB4943-2001 stipulates: 
instructions and equipment markings related to 
safety shall be in standardized Chinese. 

 P 

4. Power supply plug 

According to China’s particular standard for 
power supply plug, it is added in article 3.2.1 of 
GB4943-2001 that plug connecting equipment 
with AC mains supply shall be in accordance with 
requirements of GB1002. 

 

N/A 

 

 

 

 

 

 

Page 84 of 91 

ST-05368 

 

IEC 60950-1 / EN 60950-1 

Clause 

Requirement – Test  

Result – Remark  

Verdict 

 

TRF No.: IECEN60950_1A 

 
 
 

 

 

 

1.5.101 Addition 

Plugs for the connection of the apparatus to the 
supply mains shall comply with the Korean 
requirement (KSC 8305 and 8305). 

 N/A 

7 Addition 

EMC 

The apparatus shall comply with the relevant 
CISPR standards. 

 

P 

 

 

 

 

Page 85 of 91 

ST-05368 

 

IEC 60950-1 / EN 60950-1 

Clause 

Requirement – Test  

Result – Remark  

Verdict 

 

TRF No.: IECEN60950_1A 

 
 
 

 

 

 

 

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. 

 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. 

 P 

 

 

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. 

P 

1.4.14 

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

 P