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IEC 60950-1 (ed.1) 

 

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Report No.   114383 

 

 

 
 

 

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. 

N 

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 

N 

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. 

Class III equipment. 

N 

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. 

N 

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. 

N 

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. 

The rated power is 
less than 3kW. 

N 

 

IEC 60950-1 (ed.1) 

 

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Report No.   114383 

 

 

Detachable power 
cord set (consists 
of mains plug, 
mains cord and 
appliance 
connector 

Detachable power cord set must be 
listed in the test report critical 
component list. 

Class III equipment. 

N 

Circuit diagrams 

Circuit diagrams must be indicated 
with component’s values for 
products tested to IEC 60065 and 
IEC 60950. 

Class III equipment. 

N 

Circuit diagrams of 
electronic modules 
in electrical 
appliances 

Circuit diagrams of the electronic 
modules in the electrical appliances 
must be provided. 

No electronic 
modules. 

N 

Controlled goods 
likely to be treated 
as toy by children 

Controlled goods, having an 
enclosure, which is shaped and 
decorated so that it is likely to be 
treated as a toy by children, shall 
not be accepted for certification and 
registration. 

The equipment is 
not treated as toy 
by children. 

N 

3-pin AC adaptor 

Test report showing that the 3-pin 
complied with sub-clauses 12.1 & 
12.3 of SS 246 must be submitted. 

Class III equipment. 

N 

2-pin 

AC 

adaptor 

The 2-pin (Appendix W) shall 
comply with IEC 83: 1975 (Standard 
C5, Version II) or EN 50075 

Class III equipment. 

N 

Detachable power 
supply cord set not 
supplied by 
Registered 
Supplier 

Registered Supplier who is not 
supplying the detachable power 
supply cord set together with the AC 
Adaptor must provide written 
instruction to its customer on the 
type of approved detachable power 
cord set to use. 

Class III equipment. 

N 

CD/DVD ROM 
(used in personal 
computer) 

Test certificate showing that 
CD/DVD ROM has complied with 
IEC 825 must be provided. 

The equipment 
does not consist of 
CD/DVD ROM. 

N 

Modem Card (used 
in personal 
computer) 

Modem card incorporated in the 
personal computer must be tested 
at set level (sub-clauses 5.1 & 6 of 
IEC 60950) or at component level. 

The equipment 
does not consist of 
Modem Card. 

N 

IEC 60950-1 (ed.1) 

 

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Report No.   114383 

 

 

 

Clause 

Requirements – Test 

Result – Remark 

Verdict

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 
electrical and building installations. The bi-national standard (CAN/CSA C22.2 No. 60950-1/UL 
60950-1, First Edition) should be consulted for further details on the national differences 
summarized below 

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 

1.4.14 

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

Class III equipment. 

N 

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

Interconnecting cables contain 
SELV only. 

P 

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. 

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 

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. 

N 

IEC 60950-1 (ed.1) 

 

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Report No.   114383 

 

 

2.7.1 

Suitable NEC/CEC branch circuit protection rated 
at the maximum circuit rating 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. 

No standard supply outlets, 
receptacles, lampholders or such 
transformers. 

N 

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 

3.2.1 

Power supply cords are required to have 
attachment plugs rated not less than 125% of the 
rated current of the equipment. 

Class III equipment. 

N 

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. The 
equipment is not permanently 
connected to the mains. 

N 

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 of the NEC, and 
Tables 11 and 12 of the CEC. 

Class III equipment. 

N 

3.2.9 

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

 

Class III equipment. The 
equipment is not permanently 
connected to the mains. 

N 

3.3 

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

Class III equipment. 

N 

3.3.3 

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

2

). 

Class III equipment. 

N 

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% of the equipment rating, and 
specially marked when specified (1.7.7).  

Class III equipment. The 
equipment is not permanently 
connected to the mains. 

N 

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 motors in the equipment. 

N 

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. 

Switch is not used as disconnect 
device. 

N