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Order No. 

27772 

 

 

Test 8 of IEC 60851-3:1996, 5.1.1, using the mandrel 
diameters of table U.1. The test sample is then 
examined in accordance with IEC 60851-3:1996, 
5.1.1.4, followed by the test of 5.2.2 of this standard 
except applying the test voltage between the wire and 
the mandrel. A test voltage shall not be less than twice 
the appropriate voltage in table 5B (see 5.2.2) of this 
standard. However, the minimum values shall be as 
follows: 

- for BASIC INSULATION or SUPPLEMENTARY 
INSULATION, 1500 V, or; 

- for REINFORCED INSULATION, 3000 V. 

No such wire used. 

 
The tension to be applied to the wire during winding o n 
the mandrel is calculated from the wire diameter to be 
equivalent to 118 Mpa ± 10 % (118 N/mm2 ± 10 %). 

No such wire used. 

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Order No. 

27772

 

 
 

 
 

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).  

Class III equipment. 
 

7 

Addition 
EMC 
The apparatus shall comply with the relevant 
CISPR standards. 

Must be considered before 
marketing in Korea. 

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Order No. 

27772 

 

 
 

1.2.8.6 

After NOTE 2, insert the following: 

NOTE 3 – This definition for SELV CIRCUIT 
differs from the term “SELV system” as given 
in SS CP 5. 

Considered. 

2.9.2 

After the first paragraph, insert the following: 
Under tropical conditions the duration of the 
humidity conditioning is 5 days (120h) at a 
temperature (t) of 40°C 

±

 2°C with a relative 

humidity of 90% to 95%. 

Class III equipment, no testing 
considered necessary. 

2.10.6.5  

Delete “48h”. 

Considered. 

3.2.8 

Replace “23°C 

±

 2°C by “27°C 

±

 2°C”. 

Considered. 

Attention is also drawn to the following: 

1 

For a.c. power distribution systems, only TN-S 
and TT systems are allowed in the Republic of 
Singapore. 

Class III equipment. 

2 

Where the phrase “this standard” appears, it 
should be read as “Singapore Standard SS 
337”. 

Considered. 

3 

The comma has been used throughout as a 
decimal marker in IEC60950, whereas in 
Singapore standards it is practice to use a  
full-point on the baseline as the decimal 
marker. 

Considered. 

The IEC standards refered to shall be replaced 
by Singapore Standards as follows: 

4 

International  
standard 

IEC 60065 

IEC 60227 

Corresponding 
Singapore Standard  

SS 143 : 2000 

SS 358 : - 

Considered. 

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Order No.  27772 

 

 
 

 

 

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 form the basis for the rules and practices followed in the 
electrical and building installations.  

1.1.1  

All equipment is to be designed to allow 
installations in accordance with the National 
Electrical Code (NEC), ANSI/NFPA 70, the 
Canadian Electrical Code (CEC), Part 1, 
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. 

1.4.14 

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

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. 

The interconnecting cables contain 
only SELV.