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Report No.  111547 

 

 

Replacement: 
Electric strength 
The test sample is prepared according to IEC 60851-
5:1997, 4.4.1 (for a twisted pair). The sample is then 
subjected to the test of 5.2.2 of this standard, with a 
test voltage not 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, 3000 V, or; 

- for REINFORCED INSULATION, 6000 V. 

 

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. 

NOTE: “twice” in the 6

th

 line is deleted – ref. 

confirmation by Japan NCB – JQA.

 

 

 

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

 

Replace the first paragraph with the following. 
Test 9 of IEC 60851-6:1996, followed by the electric 
strength test of 5.2.2 of this standard except applying 
the test voltage between the wire and the mandrel. A 
test voltage shall be 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

 

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Report No.  111547 

 

 

Replace the third paragraph describing the test voltage 
with the following. 
The test voltage shall not be less than 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. 
It is applied between the shot and the conductor. 

 

Replace with the following. 
The test voltage for ROUTINE TESTING shall be the 
appropriate voltage in table 5B (see 5.2.2) of this 
standard. Howeve, the minimum values shall be as 
follows: 
 
- for BASIC INSULATION or SUPPLEMENTARY 
INSULATION, 1500 V r.m.s. or 2100 V peak, or; 
 
- for REINFORCED INSULATION, 3000 V r.m.s. or 
4200 V peak. 

 

Replace with the following. 
Twisted pair samples shall be tested in accordance 
with IEC 60851-5:1996, 4.4.1. The minimum 
breakdown voltage shall not be less than twice the 
appropriate voltage in table 5B (see 5.2.2) of this 
standard. However, the minimum values shallbe as 
follows: 
 
- for BASIC INSULATION or SUPPLEMENTARY 
INSULATION, 3000 V r.m.s. or 4200 V peak, or; 
 
- for REINFORCED INSULATION, 6000 V r.m.s. or 
8400 V peak. 

 

IEC 60950-1 (ed.1) 

 

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Report No.   111547 

 

 

Clause 

Requirements – Test 

Result – Remark 

Verdict 

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. 

 

 

IEC 60950-1 (ed.1) 

 

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Report No.   111547 

 

 
 

 

The Safety Authority monitors the safety of the controlled goods sold in Singapore by 
investigating all complaints, incidents and accidents reported to the authority. Experiences 
gained are translated into the Safety Authority’s Requirements. These requirements are to be 
fulfilled in addition to the applicable safety standards.

All appliances 

All appliances must be tested to 230 
VAC. 

Class III equipment. 

Voltage selector 
(voltage mis-match 
test) 

Appliance fitted with voltage selector 
shall be tested as follows: 
Connect appliance to 230 VAC 
mains with voltage selector switch to 
settings not suitable for operation at 
230 VAC. 

No voltage selector 
switch. 

Tropical condition 
test 

All appliances (with tropical test 
requirements in applicable 
Standards) shall comply with the 
tropical condition test as stated in 
the relevant IEC Standards. 

Equipment contains 
functional insulation 
only. 

Class I appliances  

(3-pin mains plug) 

All Class I appliances must be fitted 
with 3-pin mains plugs

 

complied 

with SS 145/SS 472 that are 
registered with the Safety Authority.  

Class III equipment. 

Class II appliances 

(mains plug) 

a) All Class II appliances must be 
fitted with 2-pin mains plug 
(Appendix W) complied with IEC 83: 
1975 (Standard C5, Version II) or 
EN 50075: 1991. 

 

b) Class II appliances that are fitted 
with 3-pin mains plugs must use 
plugs that are complied with SS 145 
and registered with the Safety 
Authority. 

Class III equipment. 

Appliances rated 

≥ 

3 kW or connected 
to fixed wiring 

Electric appliance 

≥ 3 kW must be 

connected to fixed wiring. All 
connection to fixed wiring must be in 
accordance with Code of Practice 
CP5. 

Class III equipment.