WiHoo WHOO1000 Other

Page 2 of 43 Report No.:STL2021S0110237R-S1

Test item particulars ............................................... :

Classification of installation and use ...................... :

Supply Connection ................................................. :

Small fan

Portable appliance, Class III appliance

Micro USB

Possible test case verdicts:

- test case does not apply to the test object

.........

: N/A

- test object does meet the requirement................: P (Pass)

- test object does not meet the requirement......... : F (Fail)

Testing......................................................................:

Date of receipt of test item...................................... : 2021-01-10

Date (s) of performance of tests

.............................

: 2021-01-10 to 2021-01-25

General remarks:

The test results presented in this report relate only to the object tested.
This report shall not be reproduced, except in full, without the written approval of the Issuing testing
laboratory.
"(see Enclosure #)" refers to additional information appended to the report.
"(see appended table)" refers to a table appended to the report.
Throughout this report a comma (point) is used as the decimal separator.

Copy of Marking plate (marking will be the one finally provided on product for selling)

Small fan WiHoo

Model: SF01
Rating: 5V 2A
Shenzhen Nanpiaochen Industry Co.,Ltd
zhenye luanshangu huayuan 6dong 2danyuan 25H longgang
district longgang street baohe road Shenzhen
GuangdongDD/MM/YYYY S/N:xxxxx

Made in China

Remarks

The use of certification marks on a product must be authorized by the respective
certification bodies that own these marks.

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Page 3 of 43 Report No.:STL2021S0110237R-S1

Clause Performance Test

ALL APPLIANCES

41 Leakage Current Test N/A --

42 Continuity of Grounding Circuit Test N/A --

43 Limited Short-Circuit Test N/A --

44 Starting Current Test N/A --

45 Input Test Pass --

46 Temperature Test Pass --

47 Dielectric Voltage-Withstand Test Pass --

48 Water Spray Test N/A --

49 Hosedown Test N/A --

50 Locked Rotor Test Pass --

51 Locked Rotor Cycling Pass --

52 Flagging N/A --

53 Humidity Conditioning Test Pass --

54 Strain Relief Test N/A --

55 Interconnecting Cords and Leads N/A --

56 Unguarded Impeller Tests N/A --

57 Push Back Relief Test N/A --

58 Oscillating Fan Test . N/A --

59 Tests of Switches and Controls Pass --

60 Static Load Test For Mounting Means N/A --

61 Impact Test on Guards Pass --

62 Static Force Test on Guards Pass --

63 Impeller Test for Portable Fans Pass --

64 Impeller Ignition Test N/A --

65 Component Breakdown Test N/A --

66 Fuseholder Cover Test N/A --

67 General Purpose Transformers N/A --

68 Thermal Aging Pass --

69 Permanence of Marking Tests Pass --

PORTABLE APPLIANCES

70 Drop Test Pass --

71 Security of Handle Test Pass --

72 Stability Test N/A --

73 Hassock Fan Load Test N/A --

Standard for Electric Fans (UL507, 10th Ed. Nov. 09, 2017)

REQUIRED

Remarks

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Page 4 of 43 Report No.:STL2021S0110237R-S1

41

Leakage Current Test

Method(s):

A sample of the appliance shall be placed on an insulated surface and be connected to a V, 60 Hz
source of supply. Leakage currents to earth ground were measured from all exposed conductive surface of
the unit by a meter having an input impedance of 1500Ω resistive shunted by a capacitance of 0.15μF. For
enclosure surface other than metal, the leakage current was measured using a metal foil with an area of 10
20cm in contact with the surface.



The leakage current shall not exceed [0.5 / 0.75] mA.

Result(s): N/A

Condition S1 S2 Tested position I measured ( mA )

a. - Unit ON OFF

OFFAB

b. - Unit ON

(0 - 5 seconds)

c. - Unit ON

(Thermal stabilization)

ON

ON

ON

ON

A

B

A

B

Live parts to
enclosure with
metal foil

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Page 5 of 43 Report No.:STL2021S0110237R-S1

42

Continuity of Grounding Circuit Test

Method(s):

The resistance shall be not more than 0.1 Ω between any point required to be grounded, as specified in

28.1.2, and:

a)

For an appliance intended for permanent electrical connection, the point on the enclosure at which
the power-supply system is connected.

b)

For a cord-connected appliance employing a grounding conductor in the cord, the point to which the
grounding conductor of the power-supply cord is connected.

The resistance shall be determined by any convenient method. When unacceptable results are obtained,
either a direct or alternating current equal to the current rating of the maximum-current-rated branch-circuit
overcurrent-protective device that is employed with the appliance is to be passed from the equipment
grounding terminal or the point of attachment of the wiring system to the dead metal part, and the resulting
drop in potential is to be measured between these two points. The resistance in ohms is determined by
dividing the drop in potential in volts by the current in amperes passing between the two points.

Result(s): N/A

Resistance between: Test resistance (Ω) Required resistance (Ω)

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Page 6 of 43 Report No.:STL2021S0110237R-S1

43

Limited Short-Circuit Test

Method(s):

Three samples of the enclosure/conduit construction are to be subjected to the test. The current is
to be as specified in 43.1. The test circuit is to have a power factor of 0.9 – 1.0 and is to be limited to the
current specified in Table 43.1. The open-circuit voltage of the test circuit is to be 100 – 105 percent of
the rated voltage of the equipment.

The enclosure is to be connected to the circuit through appropriately sized 6 inch-length of flexible metal
conduit and a ground terminal suitable for connection of 3/0 AWG copper conductors is to be installed as
close as possible to the internal conduit locknut. The free ends of each 4 foot-length of 3/0 AWG copper
conductor are connected to each the supply as described in 43.2 through a series connected nonrenewable
fuse that does not open in less than 12 seconds when carrying twice its rated current.

Result(s): N/A

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Page 7 of 43 Report No.:STL2021S0110237R-S1

44

Starting Current Test

Method(s):

When operated as described in below, an appliance shall start and operate normally without:

a)

Tripping an overload protector provided as part of the appliance; or

b)

Opening the fuse, when connected to a circuit protected by a fuse.

The appliance is to be connected to a power-supply circuit protected by a non-time delay fuse or time-delay
fuse. The appliance is to be at room temperature at the beginning of the test. The appliance is to be started
three times without tripping an overload protector provided as part of the appliance, or opening the fuse
protecting the supply circuit. Each start of the appliance is to be made under conditions representing the
beginning of normal operation – the beginning of the normal operating cycle in the case of an automatic
appliance. The motor of the appliance is to be allowed to come to full speed after each start, and to come to
rest between successive starts.

Result(s): N/A

Test voltage: V, Hz.

1.

For each start, the appliance [ did / did not ] open the A fuse.

2.

For each start, the appliance [ did / did not ] trip an overload protector.

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Page 8 of 43 Report No.:STL2021S0110237R-S1

45

INPUT TEST

Method(s):

The current input to an appliance shall be not more than 110 percent of the rated value when the appliance is
operated under conditions of intended service, when connected to a power-supply circuit of maximum rated
voltage and rated frequency.

Result(s): Pass

TABLE: Power input deviation

Input deviation of/at: P rated (W) P measured

(W)

5V 10W 9.8

TABLE: Current deviation

Input deviation of/at: I rated (A) I measured (A) dP Required dP Remark

5V 2A 1.96

dP Required dP Remark

98％ 110％

98％ 110％

P

P

Pass

Pass

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Page 9 of 43 Report No.:STL2021S0110237R-S1

46

TEMPERATURE TEST

Method(s):

The sample shall be connected to a V, 60 Hz supply and operated at maximum normal load. Using
thermocouples and a hybrid recorder to record temperatures. The test is to be continued until temperatures
have become constant.

Result(s): Pass

Input: _5_ V, _/ Hz, 1.96 A, 9.8 W; Ambient Temperature: 25_ °C.

temperature rise dT of part/at: dT (°C) required dT (°C)

Plastic enclosure of fan 34.5 85

Battery 42.3 45

Internal wire 31.4 80

Motor winding 55.6 105

Motor core 50.1 105

Handles 27.6 60

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Page 10 of 43 Report No.:STL2021S0110237R-S1

47

Dielectric Voltage Withstand Test

Method(s):

An appliance shall withstand for 1 minute without breakdown the application of a 60 Hz essentially sinusoidal
potential of the value indicated below between the following:

a)

Uninsulated live metal parts and the enclosure. A non-conductive enclosure is to be wrapped in
conductive foil.

b)

Terminals of opposite polarity.

c)

Uninsulated live metal parts and accessible dead metal parts.

d)

Uninsulated live metal parts and grounding contacts of grounding type receptacles.

e)

Primary and isolated secondary circuits.

The test potential is to be as follows:

a)

One thousand volts for an appliance employing a motor rated 373 watts (1/2 horsepower output) or
less and rated 250 V or less.

b)

One thousand volts plus twice the rated voltage for an appliance employing a motor rated more than
373 watts (1/2 horsepower output) or more than 250 V.

c)

Five hundred volts for an appliance operating at 50 V or less.

Result(s): Pass

test voltage applied between: test voltage (V) breakdown

‘+’ and ‘-’ to accessible parts 500V No

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Page 11 of 43 Report No.:STL2021S0110237R-S1

48

Water Spray Test

Method(s):

The appliance is to be mounted in accordance with the installation instructions. For items of installation not
covered by the instructions, the most severe method of test installation is to be used.

Compliance with the water spray test shall be determined by:

a)

A visual inspection to determine that there is no wetting of uninsulated live parts or filmcoated wire –
other than motor windings – and no accumulation of water in the wiring compartment or channel. The
accumulation of water droplets shall only be acceptable when the fan complies with the tests in (b)
and (c).

b)

A leakage current test for 120 V cord connected appliances (see 38.4.1 – 38.4.6) or an insulation
resistance test for all other appliances (see 38.5.1).

c)

A dielectric voltage withstand test (see 38.6.1),

Result(s): N/A

1.

There [ was / was no ] wetting of uninsulated live parts or filmcoated wire – other than motor windings
and accumulation of water in the wiring compartment or channel.

2.

Leakage current was mA, or resistance was Ω.

3.

The sample [ did/did not ] comply with the dielectric voltage withstand requirements, immediately after
each of the leakage current measurements.

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Page 12 of 43 Report No.:STL2021S0110237R-S1

49

Hosedown Test

Method(s):

At the conclusion of the test described in followings, a fan shall have no standing water inside the enclosure
and there shall be no water on uninsulated live parts or on film-coated wire, other than motor windings.

For a permanently installed fan that is connected to conduit during installation, a conduit is to be installed on
the enclosure to equalize internal and external pressures as required, but it is not to serve as a drain. No
sealing compound other than that normally provided by the manufacturer is to be used. The enclosure interior
is to be dry.

The enclosure and its external mechanisms are then to be sprayed by water from a hose having a 25.4-mm
(1-inch) inside diameter nozzle that delivers at least 246 L (65 gallons) of water per minute. The water stream
is to be directed at the fan from a distance of 3 – 3.7 m (10 – 12 feet) and is to be moved along the enclosure
or surface at a minimum rate of 1.6 cm/sec (4 inches per second).

For an enclosure having a test length – height plus width plus depth dimension – of 1.9 m (75 inches) or less,
the duration of the water stream contact with the enclosure is to be 5 minutes. For an enclosure having a test
length exceeding 1.9 m (75 inches), the duration of water stream contact in minutes is to be 2.6 times the test
length measured in meters (the test length measured in inches divided by 15).

Result(s): N/A

1.

There [ was / was no ] standing water inside the enclosure.

2.

There [ was / was no ] wetting of uninsulated live parts or filmcoated wire, other than motor windings.

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Page 13 of 43 Report No.:STL2021S0110237R-S1

50

Locked Rotor Test

Method(s):

The fan is to be installed or placed in its intended position with the rotor of the fan motor locked and
energized as described in the Locked-Rotor Temperature Test in UL 2111, the Standard for Overheating
Protection for Motors. The temperature is to be determined after thermal equilibrium is attained.

Result(s): Pass

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Page 14 of 43 Report No.:STL2021S0110237R-S1

51

Locked Rotor Cycling

Method(s):

Three motor samples are to be provided with the coil wrap terminating on the bend of the coil and are to be
subjected to the test described in 51.2 – 51.4.

Each sample is to be energized at a test potential in accordance with Table 40.1 with the rotor locked. The
motor circuit is to be cycled on and off as quickly as the motor allows. The winding temperatures shall reach
the maximum temperature and the minimum temperature shown in Table 51.1, as determined with a
thermocouple. The test duration is to be for 18 days with the motor at room temperature at the beginning of
the test.

Protective devices shall be by-passed and when the motor does not function throughout the test, a different
motor shall be chosen and the test started from the beginning. When a part, such as a capacitor, can be
replaced in order for the motor to function, then the test may continue.

As a result of the test in 51.2 and 51.3, there shall be no loosening of the coil wrap, lifting of the coil wrap
termination greater than 1.6 mm (1/16 inch), nor other degradation of the coil wrap’s adhesive bond as
determined by visual examination.

Result(s): Pass

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Page 15 of 43 Report No.:STL2021S0110237R-S1

52

Flagging

Method(s):

The test method for flagging shall be in accordance with the Test for Flagging (as received), Method A-For
Class 1 Tape, of the Standard Test Methods for Pressure-Sensitive Adhesive-Coated Tapes Used for
Electrical and Electronic Applications, ASTM D 1000-04.

The rod used for the test shall be 19 mm (3/4 inch) in diameter.

The length of the unwound tape (flag) from the end of the tape to the point of tangent of the rod shall be less
than 1.6 mm (1/16 inch).

Result(s): N/A

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Page 16 of 43 Report No.:STL2021S0110237R-S1

53.

Humidity Conditioning Test

Method(s):

A sample of the appliance is to be heated to a temperature just above 34°C (93°F) to reduce the likelihood of
condensation of moisture during conditioning. The heated sample is then to be placed in the humidity
chamber and conditioned for 48 hours in air having a relative humidity of 88±2 percent and a temperature of
32±2°C (90±4°F). Following the conditioning:

a)

A cord-connected appliance rated for a nominal 240-volt supply or less is to be tested in the
unenergized condition as specified in 32.6(a). The sample is then to be energized and tested as
specified in 32.6(b) and (c). The test is to be discontinued when the leakage current stabilizes or
decreases.

b)

An appliance other than as mentioned in (a) is to have an insulation resistance of 50,000 ohms or
more between live parts and interconnected dead metal parts.

c)

An appliance shall comply with the dielectric voltage withstand requirements.

Result(s): Pass

1.

Leakage current:

Condition S1 S2

a. - Unit ON

b. - Unit ON

( 0 - 5 seconds)

c. - Unit ON

(Thermal stabilization)

d. - Unit OFF

(Leakage current stabilized

or decreases)

2.

The sample (did/did not) comply with the dielectric voltage withstand requirements.

OFF
OFF
ON

ON
ON

ON
ON

ON

A
B Live parts to

A
B

A
B

A
B

Tested

position

enclosure
with metal
foil

Measured maximum leakage current

( mA )

0.005

0.007

0.01

0.001

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Page 17 of 43 Report No.:STL2021S0110237R-S1

54.

Strain Relief Test

Method(s):

The strain relief means:

(a)

provided on a flexible cord shall withstand for 1 minute without displacement a direct pull of 155.68N
(35 pounds) applied to the cord with the connections within the appliance disconnected.

(b)

a torque of N·m in either direction is applied for 1 minute between the cord and the enclosure; and

Result(s): N/A

1.

There (was/was no) such movement of the cord as to indicate that pull on the connections have resulted.

2.

There (was/was no) such movement of the cord as to indicate that torque on the connections have
resulted.

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Page 18 of 43 Report No.:STL2021S0110237R-S1

55

Interconnecting Cords and Leads

Method(s):

55.1

Each lead or flexible cord provided for wiring between components or for interconnection between parts
of a motor, (e.g. motor windings to capacitor, motor connections to receptacle, light connections to receptacle,
etc.) shall be subjected to the test described in 54.1 and 54.3 except that the pull shall be 20 pounds (89 N).
Each lead or cord is to be tested with the 20-pound (9-kg) weight.

Exception No. 1: This test is to be waived if the lead or cord is routed such that it cannot be easily grasped or
subject to other means of mechanical strain.
Exception No. 2: This test is to be conducted on all leads simultaneously when the leads are bundled such
that individual leads cannot be easily grasped or subject to other means of mechanical strain.
Exception No. 3: When testing the terminals of a device intended for crimp connection, there shall be no
damage to the connection or separation of the conductor from the crimp.
Exception No. 4: Mechanically secured and soldered connections and the connections of multi-pole
connectors are not required to be disconnected prior to application of the force

Result(s): N/A

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Page 19 of 43 Report No.:STL2021S0110237R-S1

56

Unguarded Impeller Tests

An impeller of a portable fan not required to be guarded shall not break, crack, or chip when operated for 1
hour connected to a supply voltage of 130 percent of the rated supply voltage. The test is to be conducted
before and after conditioning as described in 56.2.

An impeller not required to be guarded is to be placed in an air-circulating oven maintained at 70°C (158°F)
for 7 hours. After removal, it is to be tested as described in Section 56, Unguarded Impeller Tests; Section 61,
Impact Test on Guards; and Section 70, Drop Test. As a result of the testing, the impeller shall not break.

A motor-driven impeller not required to be guarded shall be energyabsorbent to the extent that a 3.2 mm (1/8
inch) diameter dry hardwood dowel does not break when thrust into a rotating blade. The fan is to be fixed in
place and energized so that the impeller rotates at intended speed. The dowel is to be supported on a stable,
stationary flat surface perpendicular to the plane of rotation. The surface is to have a straight edge located
approximately 9.5 mm (3/8 inch) from the fan blade. The dowel is then to be suddenly thrust and retained by
hand along an axis perpendicular to the plane of impeller rotation into the blade. This procedure is to be
repeated at different points on the impeller (blade and hub) with the impeller rotating at all intended speeds
and from in front of and behind the impeller in order to include the most severe condition.

Result(s): Pass

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Page 20 of 43 Report No.:STL2021S0110237R-S1

57. Push Back Relief Test

Method(s):

The supply cord or lead is to be held 25 mm (1 inch) from the point where the cord or lead emerges from the
product and is then to be pushed back into the product. When a removable bushing that extends further than
25mm(1 inch) is present, it is to be removed prior to the test. When the bushing is an integral part of thecord,
the test is to be carried out by holding the bushing. The cord or lead is to be pushed back in to the product in
25mm(1-inch) increments until the cord buckles or the force to push the cord into the product exceeds 27N(6
pounds –force).

Result(s): N/A

The sample was tested (with/without) occurrence of any of the following conditions:
a)

Mechanical damage to the supply cord or lead;

b)

Exposure of the supply cord or lead to a temperature higher than that for which it israted.

c)

Reduction of spacing (such as to a metal strain –relief clamp) below the minimum required values; or

d)

Damage to internal connections or components.

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Page 21 of 43 Report No.:STL2021S0110237R-S1

58

Oscillating Fan Test

Method(s):

58.1

An oscillating or adjustable appliance in which normal function causes movement of the power supply
cord, electrical wiring or other insulated live parts, shall withstand an endurance test for the number of cycles
described in 58.2. Upon completion of the test:
a)

There shall be no electrical malfunction of the appliance;

b)

There shall be no exposure of an uninsulated conductor strand either within or outside of the enclosure;

c)

The appliance shall comply with the Dielectric Voltage Withstand Test;

d)

There shall be no breakage of more than 10 percent of the strands of any conductor strands; and

e)

There shall be no signs of oscillation cord or wire insulation abrasion.

58.2

The endurance test required by 58.1 is to consist of:
a)

750,000 cycles of operation for an appliance in which the movement of the power-supply cord, electrical
wiring, or other insulated live parts occurs as a result of the operation of an automatic mechanical feature.
b)

6000 cycles of operation for an appliance in which the movement of the power-supply cord, electrical wiring
or other insulated live parts only as a result of the operation of a manual feature.

Exception: The 6000 cycle test in 58.2 need not be conducted if it is determined that the component power
supply cord has been previously subjected to the 6000 cycle flex testing, and it is determined in the
application that it is not subjected to rubbing, chafing, or similar mechanical stress.

58.3

Where movement of electrical wiring or other insulated live parts occurs, six representative samples
shall be subjected to this test. Throughout the test, the appliance shall be continuously energized at
maximum rated input. The movable member shall be operated so that it will reach the limits of travel in both
directions during each cycle by either the integral automatic mechanical feature of the appliance or by a
external mechanical arrangement that operates the movable member. The cycling rate shall be one of the
following:
a)

Twelve cycles per minute;

b)

The rate at which the automatic mechanical feature operates, if the rate is less than 12 cycles per minute;
or c) Greater than 12 cycles per minute using the external mechanical arrangement, if agreeable to all
concerned, or as controlled by the integral automatic mechanical feature.

58.4

For an oscillating fan with a tilting head assembly, two samples are to be oriented in the head fully
forward position, two are to be oriented in the head straight up position, and two are to be oriented in the head
fully back position

Result(s): N/A

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Page 22 of 43 Report No.:STL2021S0110237R-S1

59

Tests of Switches and Controls

A switch or other device that controls a motor and that has not been previously investigated for its suitability
of controlling a motor shall perform acceptably when subjected to an overload test consisting of 50 cycles of
operation, making and breaking the locked-rotor current of the motor. As a result of the test, there shall be no
electrical or mechanical breakdown of the device. The fuse in the grounding connection shall not open

In a test to determine whether a switch or other control device complies with the requirements in 59.1.1, the
appliance is to be connected to a grounded supply circuit of rated frequency and maximum rated voltage in
accordance with 46.1.10, with the rotor of the motor locked in position. During the test, exposed dead metal
parts of the appliance are to be connected to ground through a 3 ampere plug fuse, and the connection is to
be such that any single-pole, current-rupturing device is connected in the ungrounded conductor of the supply
circuit. If the appliance is intended for use on direct current, or on direct current as well as on alternating
current, the exposed dead metal parts are to be connected so as to be positive with respect to a single-pole,
current-rupturing control device. The device is to be operated at a maximum rate of 10 cycles per minute,
except that a faster rate of operation is to be employed only when agreeable to all concerned.

Result(s): Pass

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Page 23 of 43 Report No.:STL2021S0110237R-S1

60.

Static Load Test For Mounting Means

Method(s):

60.1

When subjected to the test specified in 60.2 – 60.3, a cord-connected wall- or ceiling-surfacemounted
or direct plug-in appliance shall comply with the following:
a)

The security of the attachment of the appliance to the wall shall not be adverselyaffected;

b)

There shall be no evidence of a risk of fire or electric shock;

c)

The insulation resistance between live and dead-metal parts shall not be less than 50,000 ohms;and

d)

The appliance shall withstand for 1 minute without breakdown the application of a 60-hertz essentially
sinusoidal potential of 1000 volts between live and dead-metal parts.
Exception: This requirement does not apply to cord-connected rangehoods.

60.2

An appliance that is wall or ceiling surface mounted as mentioned in 60.1 is to be mounted in
accordance with the installation instructions provided by the manufacturer on 3/8-inch-thick plasterboard (dry
wall) on nominal 2 by 4-inch wood studs/joists spaced on 24 inch (609 mm) centers. The mounting parts are
to be used as specified in the instructions, and the securing screws are to be located between the studs/joists
and secured in the plasterboard.
Exception: Commercial/industrial products shall be mounted in accordance with the installation instructions
provided by the manufacturer.

60.3

After installation, the appliance is to be subjected to a static load. The load is to be applied so as to
transmit the maximum amount of stress to the mounting means and is to be increased during a 5 to 10
second interval, until a load equal to the weight of the product plus a force of three times the weight of the
product, but not less than 10 pounds (45 N), is applied to the mounting system. The load is to be maintained
for 1 minute.

60.4

Testing is to be repeated for all industrial/commercial air circulator fan head/mounting assembly
combinations as described in 80.4.2.

Result(s): N/A

The probe (could/could not) contact any moving part.

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Page 24 of 43 Report No.:STL2021S0110237R-S1

61.

Impact Test on Guards

Method(s):

A polymeric guard that is subject to impact, such as one on a portable fan, the malfunction of which results in
a risk of injury to persons, that is subjected to impact shall withstand the impact test.

An appliance is to be subjected to an impact of 2.0 J (1.5 foot-pounds) on any surface that is exposed to a
blow during intended use. Only one impact is to be applied at a given point. The impact is to be produced by
dropping a steel sphere, 50.8 mm (2 inches) in diameter and weighing approximately 0.54 kg (1.18 pounds),
from a height of 381 mm (15 inches). For surfaces other than the top of an enclosure, the steel sphere is to
be suspended by a cord and allowed to swing as a pendulum, dropping through a vertical distance of 381 mm.
For the test on a freestanding fan, the fan is to stand in its intended operating position without restraint.

Following the impact test, the probe illustrated in Figure 8.1 is to be used to determine whether a portion of an
impeller that presents a risk of injury to persons is exposed.

Result(s): Pass

The probe (could/could not) contact any moving part.

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Page 25 of 43 Report No.:STL2021S0110237R-S1

62.

Static Force Test on Guards

Method(s):

An 88.96N (20 pounds) force is applied for 1 minute over a 50.8 mm (2-inch) diameter area to any part of the
guard. The probe in Figure 8.1 is used to determine if spacing to a moving part that cause injury to persons are
reduced so that the probe can contact a portion of an impeller that can cause injury to persons.

Result(s): Pass

The probe shown in Figure 8.1 (could/could not) contact moving part that can cause injury to persons when
inserted in any opening in the guard.

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Page 26 of 43 Report No.:STL2021S0110237R-S1

63

IMPELLER TEST FOR PORTABLE FANS

Method(s):

With reference to the requirement in 9.2.12, the following tests are to be conducted on non-metallic impellers
of portable fans and window fans. A 6.35 mm (1/4 inch) diameter steel rod is to be pushed suddenly into the
blade with the fan resting on the floor and operating at maximum speed and rated voltage. A test is to be
made with the rod inserted near the hub, and a second sample is to be tested with the rod inserted 2/3 of the
distance from the hub to the tip of the blade. The rod is to rest on the guard as it is inserted. A part of the
blade is not to be thrown more than 1.52 m (5 feet) from the closest part of the base of the fan.

Result(s): Pass

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Page 27 of 43 Report No.:STL2021S0110237R-S1

64

IMPELLER IGNITION TEST

Method(s):

64.1

The requirements in this Section are intended to investigate the risk of fire for fans as referenced in the
Exception No. 1 (e) of7.4.2. 64.2 A polymeric impeller that is located outside a thermally protected motor on a
fan that does not comply with 7.4.2 and Exception No. 1 (a) – (d) of 7.4.2the shall not ignite as a result of a
locked rotor test conducted as described in 64.3. Exception: When the impeller ignites, the results meet the
intent of the requirement only when the cheesecloth does not ignite and there is no emission of flame beyond
the fan enclosure during the following test on three additional fans: a) A double layer of cheesecloth is to
completely cover each fan before the test; and b) The test described in 64.3 is to be repeated. 64.3 The
motor thermal protector is to be shunted out of the motor winding so that the motor stays continually
energized. The rotor is to be locked. The fan is to be positioned as intended in application and is to be
energized in a room ambient temperature of 10 to 40°C (50 to 104°F) at the voltage indicated in Table 40.1.
The fan is to be energized until ultimate results are observed, but no more than 18 days. This procedure is to
be repeated on two additional fan samples.

64.4 The cheesecloth referenced in the Exception to 64.2 is to be bleached, 914.40 mm (36 inches) wide,

28.22 – 30.24 meters per kilogram (14 – 15 yards per pound), and having what is known to the trade as a
count of 32 × 28 – that is, along the two directions parallel to the threads, there are 13 threads per centimeter
in one direction and 11 threads per centimeter in the other (32 threads per inch in one direction and 28
threads in the other).

Result(s): N/A

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Page 28 of 43 Report No.:STL2021S0110237R-S1

65

COMPONENT BREAKDOWN TEST

Component Breakdown Test

Method(s):

A sample shall be operated with a component such as electrolytic capacitor, a diode, or other solid-state
component short- or open-circuited, as applicable. A 3-ampere fuse was connected between all exposed
dead-metal parts of the nightlight and the neutral conductor.

Result(s):

No. Condition Observation Other

1

2

3

4

5

6

7

8

The 3-ampere fuse (was / was not) opened.

Result(s): N/A (Battery appliance)

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Page 29 of 43 Report No.:STL2021S0110237R-S1

66

FUSEHOLDER COVER TEST

Methods

66.1

When required by 25.3, an open cover shall be subjected to a force of 36 N (8 lbs) applied for 1 minute
in any direction that the cover may be removed, the open cover of a fuseholder, fused attachment plug, or
current tap, or similar device, shall not detach from the body of the device. One fuseholder is to be tested.

Result(s): N/A

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Page 30 of 43 Report No.:STL2021S0110237R-S1

67

GENERAL PURPOSE TRANSFORMERS

Methods

In addition to the end-product temperature test and dielectric voltage-withstand test, a general purpose
transformer shall also be subjected to the tests of 67.2 – 67.4.

For purposes of comparison with voltages measured as described in the overload test of 67.3, each secondary
open-circuit voltage shall be measured with the primary connected to a test voltage and frequency supply source
as indicated in input test, section45.

OVERLOAD TEST

67.3.1
core temperature recorded on the transformer during the second 50 percent load operation shall not be more
than 5°C (9°F) greater than the stabilized core temperature obtained during the initial 50-percent of load
operation. The open-circuit output voltage determined following the final 50 percent load operation shall be
within 2 percent of the output voltage measured during the Voltage Measurement Test in 67.2. As an option,
a protective device, if provided, may be bypassed when conducting this test.

67.3.2
load shall be 50 percent of the rated value, until the core, or surface temperatures if encapsulated, stabilize.
After stabilization, the load shall be adjusted until 200 percent of rated secondary current is reached. After 2
minutes of operation, the load shall be readjusted, if necessary, to restore the current to 200 percent, but no
further adjustment is to be made thereafter. The duration of this overload shall be 30 minutes. The load is
then to be restored to the original 50 percent of rated value. It shall be held at that value until the core
temperature again stabilizes or until the temperature drops to within 5°C (9°F) of the original stabilized 50­percent load-current temperature (whichever occurs first). This temperature value shall be compared with the
original 50-percent load stabilized condition, as specified in 67.3.1. Then, the secondary load shall be
removed. With the primary energized, the secondary voltage(s) shall be measured and compared with the
original output voltage measurements.

67.3.3
transformer construction or reasons such as encapsulation or filling with electrical insulating material), the
surface of the transformer enclosure shall be used. The portion of the enclosure surface used to measure
this temperature shall be the hottest spot occurring in the 100-percent load heating test.

67.3.4
adjusted after the surface temperatures have stabilized.

A transformer shall be subjected to the test conditions described in 67.3.2. The stabilized surface or

The transformer shall be operated as described in the Temperature Test in Section 46, except that the

When the core of the transformer is not accessible for direct temperature measurement (due to the

A protective device, when provided, shall be bypassed when the device opens while the load is

Repeated dielectric voltage-withstand test
1 Following the Overload Test in 67.3, the transformer shall be subjected to a repeated dielectric voltage­withstand test. The test potential shall be 65 percent of the value originally specified. After this test, the
transformer shall perform as intended.

Result(s): N/A

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Page 31 of 43 Report No.:STL2021S0110237R-S1

68

THERMAL AGING

A polymeric material employed in a Class 105 (A) insulation system in accordance with the Exception to 33.3
is to be aged for the amount of time corresponding to an aging temperature that appears on the Class 105
(A) system response shown in Figure 68.1. The insulation system is to cool to room temperature and the
applicable dielectric voltage-withstand requirements specified in Section 47 are to be applied between live
parts and noncurrent-carrying metal parts that are isolated from each other by the material under
consideration

Results: Pass

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Page 32 of 43 Report No.:STL2021S0110237R-S1

69

PERMANENCE OF MARKING TESTS

Methods

to determine compliance with 69.1, a cord tag shall be conditioned in accordance with (a) – (c). following the
conditioning each sample shall be tested in accordance with 69.3. if a tag is applied by an adhesive, the
conditioning and test are to be conducted no sooner than 25 h after application of the tag.

a)

three samples, as received, shall be tested in accordance with 69.3.

b)

three samples shall be conditioned in an air-circulating oven at 60 ±1°c (140 ±1.8°f) for 240 h followed by 30
min of conditioning at a room temperature of 23 ±2°c (73.4 ±3.6°f) and 50 ±5% relative humidity then followed by
the test in 69.3.

c)

three samples shall be conditioned for 72 hr at a humidity of 85 ±5% at 32 ±2°c (89.6 ±3.6°f) and followed by

test in 69.3 within 1 min afterconditioning

Each sample is to consist of a length of power-supply cord to which the tag has been applied. The power­supply cord, with the attachment plug pointing up, is to be held tautly in a vertical plane. A force of 5 lbf (22.2
N) is to be applied for one minute to the upper-most corner of the tag farthest from the power-supply cord,
within 1/4 in (6.4 mm) of the vertical edge of the tag. The force is to be applied vertically downward in a
direction parallel to the major axis of the cord. In determining compliance with 69.1(d), manipulation is
permissible, such as straightening of the tag by hand. To determine compliance with 69.1(d), each sample is
to be scraped 10 times across printed areas and edges, with a force of approximately 2 lbf (8.9 N), using the
edge of a 5/64-in (2.0-mm) thick steel blade held at a right angle to the test surface.

Results: Pass

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Page 33 of 43 Report No.:STL2021S0110237R-S1

70

Drop Test

Methods

A desk fan and a box fan shall withstand, with the fan operating at maximum speed, the drop test described
in 70.2.

Each of three samples of a fan is to be dropped through a distance of 914.40 mm (3 feet) to strike a
hardwood surface. Each sample is to be dropped three times. Three samples shall be employed for the test;
however, if the manufacturer so elects, fewer samples may be used in accordance with Figure 70.1. As a
result of the drop test, the probe illustrated in Figure 9.1 shall not be able to contact a portion of a blade or
blower wheel that presents a risk of injury to persons when inserted in any opening in the guard.

The hardwood surface mentioned in 70.2 is to consist of a layer of 19-mm (3/4-inch) thick tongue-and-groove
oak flooring mounted on two layers of 19-mm (3/4-inch) thick plywood. The assembly is to rest on a concrete
floor during the test

All samples are to be supported on a surface 914.40 mm (3 feet) above the hardwood surface. Each sample
is to be dislodged from the supporting surface by a sudden pull applied to the power-supply cord in a plane
parallel to the supporting surface and twice by being pushed by a force parallel to the mounting surface
applied to the top of the sample, which is to be placed at the edge of the supporting surface. The sample is to
be oriented differently for each test.

Deformation of a guard or detachment of a guard or portion of a guard during the drop test is acceptable
when the part (including ribs of a desk fan) can readily be restored to its original shape or a detached guard
can be readily replaced in the intended manner. After restoration of the guard, the probe illustrated in Figure

9.1 shall not contact a portion of a blade or blower wheel that presents a risk of injury to persons when
inserted in any opening in the guard.

A part of the blade shall not be thrown more than 1.52 m (5 feet) from the closest part of the base of the fan.

Result(s): Pass

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Page 34 of 43 Report No.:STL2021S0110237R-S1

71

Security of Handle Test

Methods

A handle used to support or carry a fan shall withstand a force of four times the weight of the fan without
breakage of the handle, its securing means, or that portion of the enclosure to which the handle is attached.

To determine if a handle complies with the requirements in 71.1, the force is to be started at zero and
gradually increased so that the force specified in 71.1 is attained in 5 to 10 seconds and maintained for 1
minute. When the handle is 76.20 mm (3 inches) or more in width, the force is to be uniformly distributed over
a 76.20-mm width at the center of the handle without clamping. When the width is less than 76.20 mm, the
force is to be distributed over the entire handle. When more than one handle is furnished on a fan and the fan
cannot be carried by only one handle, the force is to be distributed between the handles. The distribution of
forces is to be determined by measuring the percentage of the fan weight sustained by each handle with the
fan in the intended carrying position. When a fan is furnished with more than one handle and can be carried
by only one handle, each handle is to sustain the total force.

Results: Pass

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Page 35 of 43 Report No.:STL2021S0110237R-S1

72. Stability Test

Method(s):

A cord-connected freestanding appliance was placed on a plane inclined at an angle of 10 to the horizontal
with removal of casters and is adjusted and operated in any intended manner so that it is most likely to tip
over.

Result(s): N/A

The unit (did / did not) tip-over at an angle of 10 to the horizontal.

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Page 36 of 43 Report No.:STL2021S0110237R-S1

73 Hassock Fan Load Test

Method(s):

A hassock fan shall sustain a 1779 N (400 pound) load uniformly distributed over the top of the fan for 1
minute, without breakage or cracking of the enclosure or guard, after which the probe illustrated in Figure 9.1
shall not contact a portion of the impeller that presents a risk of injury to persons when inserted through any
opening in the guard or enclosure.

Result(s): N/A

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Page 37 of 43 Report No.:STL2021S0110237R-S1

Attachment No. 1: Photo documents

Fig. 1

Fig. 2

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Page 38 of 43 Report No.:STL2021S0110237R-S1

Attachment No. 1: Photo documents

Fig. 3

Fig. 4

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Page 39 of 43 Report No.:STL2021S0110237R-S1

Attachment No. 1: Photo documents

Fig. 5

Fig. 6

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Page 40 of 43 Report No.:STL2021S0110237R-S1

Attachment No. 1: Photo documents

Fig. 7

Fig. 8

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Page 41 of 43 Report No.:STL2021S0110237R-S1

Attachment No. 1: Photo documents

Fig. 9

Fig. 10

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Page 42 of 43 Report No.:STL2021S0110237R-S1

Attachment No. 1: Photo documents

Fig. 8

Fig. 11

Fig. 12

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Page 43 of 43 Report No.:STL2021S0110237R-S1

Attachment No. 1: Photo documents

Fig. 13

*** End Of Report***

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