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UL61010-1 and -2-030

U.S. National Differences

UL Staff

Prepared: August 2012

UL and the UL logo are trademarks of UL LLC © 2012

Agenda

National Differences for:

• Risk of Electric Shock

• Risk of Fire

• Protection Against Hazards from Fluids

• Components and Subassemblies

• Measuring Circuits

• Annexes

Slide 2

Permissible Limits for Accessible Parts

Normal Condition (6.3.1)

IEC 61010-1 3rd Edition

US National Differences (to be in

the North American Harmonized

Standard)

33 V rms 30 V rms

46.7 V peak 42.4 V peak

70 V dc 60 V dc

3

• Voltage Levels

Permissible Limits for Accessible Parts

Single Fault Condition (6.3.2) Continued

IEC 61010-1 3nd Edition National Differences

55 V rms 50 V rms

78 V peak 70 V peak

140 V dc 120 V dc

4

Note: Sub-clauses 6.3.2 A

Figure 2DV - Maximum duration of short-term ACCESSIBLE

voltages in SINGLE FAULT CONDITION (see 6.3.2 a))

Key

A a.c. voltage level in WET LOCATIONS C d.c. voltage level in WET LOCATIONS

B a.c. voltage level in dry locations D d.c. voltage level in dry locations

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National Difference – Protective Conductor

Impedance

6.5.2.4DV D2 Modification by replacing the text and the conformity

statement with the following:

• IEC – states 0.1 Ω, for non-detachable power cord 0.2 Ω.

• The impedance between the PROTECTIVE CONDUCTOR

TERMINAL and each ACCESSIBLE part for which PROTECTIVE

BONDING is specified shall not cause a potential drop of more than

4 V.

• IEC - Conformity is checked by applying a test current for 1 min and

then calculating impedance. The test current is the greater of

a) 25 A a.c. r.m.s. at RATED MAINS frequency or d.c.,

b) a current equal to twice the RATED current of the equipment

• Conformity is checked by inspection and by applying an a.c. test

current for the duration specified in Table 6.5.2.4DV.1 and then

measuring the voltage drop. See 4.4.4.3 for test conditions regarding

the spread of fire.

• .

6

National Difference – Protective Conductor

Impedance Continued

• The test current is twice the rating of the attachment plug cap, but

not less than 40 A.

• If the equipment contains overcurrent protection devices for all poles

of the MAINS supply, and if the wiring on the supply side of the

overcurrent protection devices cannot become connected to

ACCESSIBLE conductive parts in the case of a single fault, the test

current need not be more than twice the RATED current of the

internal overcurrent protection devices.

• If the test current exceeds 500 A, see CSA 0.4.

7

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National Difference – Table 6.5.2.4DV.1 -

Duration of Protective Bonding Test

Table 6.5.2.4DV.1 – Duration of protective bonding test

8

National Difference – Protective Bonding

impedance Conformity Statement

6.5.2.5DV D2 Modification:

• IEC - Conformity is checked by applying a test current of twice the

value of the overcurrent protection means specified in the equipment

installation instructions for the building supply MAINS CIRCUIT for 1

min between the PROTECTIVE CONDUCTOR TERMINAL and

each ACCESSIBLE conductive part for which PROTECTIVE

BONDING is required. The voltage between them shall not exceed

10 V a.c. r.m.s. or d.c.

• In the first sentence of the conformity statement, replace “1 min” with

“the duration specified in Table 6.5.2.4DV.1”.

• In the second sentence of the conformity statement, replace “10 V”

with “4 V”.

9

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National Difference - Connection to the MAINS supply

source and connections between parts of equipment

• IEC - 6.10.1 MAINS supply cords

The following requirements apply to non-detachable MAINS supply cords and to

detachable MAINS supply cords supplied with the equipment.

• Cords shall be RATED for the maximum current for the equipment and the cable

used shall meet the requirements of IEC 60227 or IEC 60245.

ND - 6.10.1DV.1 Delete the reference to the requirements of IEC 60227 or IEC

60245 for MAINS supply cords in the second paragraph

• If a cord is likely to contact hot external parts of the equipment, it shall be made

of suitably heat-resistant material.

• If the cord is detachable, both the cord and the appliance inlet shall have

adequate temperature RATINGS.

• Conductors coloured green-and-yellow shall be used only for connection to

PROTECTIVE CONDUCTOR TERMINALS.

6.10.1DV.2 Replace the fifth paragraph with the following:

ND - Green covered conductors (with or without yellow stripes) shall be used

only for connection to PROTECTIVE CONDUCTOR TERMINALS

National Difference - Connection to the MAINS supply

source and connections between parts of equipment

Detachable MAINS supply cords with MAINS connectors according to IEC 60320 shall

either meet the requirements of IEC 60799, or shall be RATED at least for the current

RATING of the MAINS connector fitted to the cord.

ND - 6.10.1DV.3 Delete the reference to the requirements of IEC 60799 for

detachable MAINS supply cords in the sixth paragraph.

ND - 6.10.1DV.4 Add the following paragraphs and new note after the sixth

paragraph:

ND - Requirements for MAINS cords or cord sets are contained in ANSI/UL 817 and

CSA C22.2 No. 21.

ND - Requirements for general use receptacles, attachment plugs, and similar

wiring devices are contained in ANSI/UL 498 and CSA C22.2 No. 42, CSA C22.2 No.

182.1, CSA C22.2 No. 182.2, and CSA C22.2 No. 182.3.

ND - NOTE This subclause only applies to cords connected to the external fixed

MAINS socket-outlet and to external interconnecting mains cords. This subclause

does not apply to cords fully contained within the equipment enclosure

• Figure 9 explains the terminology for MAINS supply cords.

• Conformity is checked by inspection and, where necessary, by measurement.

11

National Difference - 6.10.4DV.1 PERMANENTLY CONNECTED

EQUIPMENT

• Addition of a new clause

• Equipment intended for permanent connection to the MAINS

shall meet the requirements of Annex DVD.

• Conformity is checked as specified in Annex DVD.

National Difference – 6.11 Title Modification

• 6.11 Disconnection from supply source

• 6.11DV D2 Modification of the title: Add “and maintaining polarity” to

the end of the subclause title.

13

National Difference – 6.11.5DV D2 Polarity of

MAINS Connections

ND - 6.11.5DV D2 Addition of a new sub-clause for Polarity of

Connections to the MAINS Circuit:

• Any line-connected single-pole switch, any center contact of a lamp

holder, and any automatic control with a marked off position shall be

connected to a TERMINAL or lead intended for connection to the

ungrounded conductor of the supply circuit.

NOTE An “ungrounded” supply conductor is one that is not

connected to protective earth at any point in the building installation.

14

• National Difference – 9.6.1. ADV Connection of overcurrent protective devices

Added the following for connections of overcurrent protective devices

• 9.6.1ADV.1 A single-pole circuit breaker must be connected to the

ungrounded supply conductor

• 9.6.1ADV.2 A multiple-pole circuit breaker must interrupt the neutral

(grounded) and ungrounded conductors simultaneously.

• 9.6.1ADV.3 A single fuse must be in the ungrounded conductor.

• 9.6.1ADV.4 Fuses used in both the neutral (grounded) and

ungrounded supply conductors must be adjacent with same ratings

and characteristics.

• 9.6.1ADV.5 Screw shell of a plug fuseholder and accessible contact

of an extractor type fuseholder when:

• Located in the Ungrounded supply conductor: shall be connected towards

the load.

• Located in the Neutral conductor: the shell shall be connected towards the

neutral supply line.

15

• National Difference – 11.7.1. DV max. Pressure, referencing Annex G as normative for certain types

• 11.7.1DV.1 Laboratory and Testing and Measurement equipment

having both of the following characteristics shall meet the

requirements of 11.7.2 and G.5:

a) a product of pressure and volume greater than 200 kPa·l,

b) a pressure greater than 50 kPa.

• 11.7.1DV.2 Laboratory equipment and testing and measurement

equipment that do not have those characteristics shall meet the

requirements of 11.7.3 and 11.7.4, as applicable.

• 11.7.1DV.3 Process Control and other equipment shall meet the

requirements of Annex G, as applicable

16

.

• National Difference – Leakage and Rupture at High Pressure11.7.2. DV Replacing Note as follows:

• Fluid-containing parts which in NORMAL USE have both of the

following characteristics shall not cause a HAZARD through rupture

or leakage:

a) a product of pressure and volume greater than 200 kPa·l;

b) a pressure greater than 50 kPa.

Conformity is checked by inspection and, if a HAZARD could arise, by the

described hydraulic test

• NOTE National authorities may allow safety to be established by

calculation, for example according to the ASME Boiler and Pressure

Vessel Code.

17

National Difference – 14.1 Components and

Subassemblies North American Standards

• a) applicable safety requirements of a relevant IEC standard …

• b) the requirements of this standard and, where necessary for the

application, any additional applicable safety requirements of the

relevant IEC component standard, …

• c) if there is no relevant IEC standard, the requirements of this

standard;

• d) applicable safety requirements of a non-IEC standard which are at

least as high as those of the relevant IEC standard, provided that the

component has been approved to the non- IEC standard by a

recognized testing authority.

ND – In all these sub-clauses ), replace “IEC” with “ANSI, CAN, CSA,

IEC, ISO, or UL”.

ND - . Add a new note 3:

• NOTE 3: Annex DVA provides applicable safety requirements.

18

National Difference – 14.7 Printed Wiring

Boards North American Flammability

Printed wiring boards shall be made of material with a flammability

classification of V-1 or better of IEC 60695-11-10.

ND - 14.7DV D2 Addition of the following to the end of the first

paragraph:

• A flammability RATING of ANSI/UL V-1 or CAN/CSA C22.2 No. 0.17

is considered equivalent to the same classification of IEC 60695-11-

10.

19

National Difference – 14.9 Outdoor Use

ND - 14.9DV D2 Add a new sub-clause to address enclosures intended

for outdoor use:

• Nonmetallic enclosures intended for outdoor use shall meet the UV

resistance requirements of ANSI/UL 746C or of CSA C22.2 No. 0.17,

or both as appropriate.

NOTE ANSI/UL 746C, clause 25, requires a 1 000 hour UV/water exposure

preconditioning using a xenon-arc or

• alternatively a 720 hour UV/water exposure preconditioning using

twin carbon arcs. CSA C22.2 No. 0.17, subclause 5.9, permits only

the 1 000 hour UV/water exposure preconditioning.

20

National Difference – 14.10 Conductive

Coatings

ND - 14.10DV D2 Add a new subclause to address conductive

coatings, shields, and tape:

• 14.10DV.1.1 The bond of a conductive (metallic) coating applied to a

polymeric part shall be evaluated.

• 14.10DV.1.2.

a) Evaluating the bond in accordance with the requirements for

“Adhesives” in ANSI/UL 746C and/or CSA C22.2 No. 0.17, or

b) Evaluating the product to determine that peeling or flaking of the

coating would not reduce spacings or bridge live parts so as to introduce a

risk of fire or electric shock.

.

21

National Difference – 14.10 Conductive Shields,

and Tape

14.10DV.2 Conductive shield or tape

• 14.10DV.2.1 If peeling of the conductive shield or tape may introduce

a RISK of fire or electric shock, the bond between a conductive

shield or tape and any other surface shall be investigated.

• 14.10DV.2.2 Conformity is checked by inspection

22

National Difference – 14.11 Direct Plug-in

Transformers North America Standards

• ND - Add a new sub-clause14.11DV D2

• 14.11DV.1 Direct plug-in transformer units:

• Direct plug-in transformer units are subject to additional

requirements found in ANSI/UL 1310, CAN/CSA C22.2 No. 223,

ANSI/UL 60950-1, or CSA C22.2 No. 60950-1, as applicable.

23

Measuring circuit TERMINALS

Voltage on conductive parts of TERMINAL CLEARANCE and

CREEPAGE DISTANCE

V a.c. r.m.s. V d.c. mm

30 (33) 300 60 (70) 414 0,8

>300 600 >414 848 1,0

>600 1 000 >848 1 414 2,6 NOTE Values are determined by calculation for REINFORCED INSULATION. Transients are not taken into account.

ND - Table 101DV DR Modify the values in Table 101 by replacing it with the

following:

Table 101DV - CLEARANCES and CREEPAGE DISTANCES for measuring circuit

TERMINALS with HAZARDOUS LIVE conductive parts (IEC Values in brackets)

Conformity is checked by inspection and measurement.

101.3 Protection Against Mismatches of Inputs and

Ranges

ND - 101.3.3DV D2 Addition of the following test:

101.3.3DV.1 If the function or range controls have any effect on the

electrical characteristics of the input circuit, these controls shall

be changed to all possible settings while the input TERMINALS

are connected to the maximum RATED source.

Test leads for the tests of 101.3.2 and 101.3.3

101.3.4 …. If the manufacturer-supplied test leads are permanently

connected to the equipment, then the attached test leads supplied by

the manufacturer shall be used without modification.

ND - 101.3.4DV D2 Modification of 101.3.4 by deleting the following

paragraph

"If the manufacturer-supplied test leads are permanently

connected to the equipment, then the attached test leads

supplied by the manufacturer shall be used without

modification." and replacing it with the following:

101.3.4DV.1 The applicable tests of 101.3.2 and 101.3.3 shall be

performed with the test leads specified above and shall be

repeated with any test leads supplied with the equipment by

the manufacturer.

Annex DVA (informative) CSA, UL, IEC

component standards.

ND - DVA D2 Addition of a new annex DVA as follows:

• The following is a matrix that provides a cross-reference

between CSA, UL, and IEC standards for components.

• This cross-reference is not meant to imply that the standards

are equivalent. The CSA, UL, and IEC standards listed are used

for evaluation of components and features of products covered

by this standard.

• Components need only comply with the applicable component

standard acceptable in the country where the product is to be

used.

• These standards are considered to refer to the latest edition and

all revisions published to that edition.

Component Standards (Cont’d)

Component Standards (Cont’d)

Annex DVB (informative)

ND - DVB D2 Addition of a new annex DVB as follows

• A table indicating identifying all clauses that have a National

Difference

Annex DVC - (informative) - UV radiation limits: Guidelines from

the American Conference of Governmental Industrial Hygienists

(ACGIH)

• DVC D2 Addition of a new annex DVC for UV radiation limits

• DVC.1.1 These threshold limit values (TLVs) refer to ultraviolet (UV)

radiation in the spectral region between 180 and 400 nm and represent

conditions under which it is believed that nearly all workers may be

repeatedly exposed without adverse health effects.

• DVC.1.2 These values for exposure of the eye or the skin apply to UV

radiation from arc, gas, and vapor discharges, fluorescent and

incandescent sources, and solar radiation, but they do not apply to UV

lasers (see the TLV for lasers). These values do not apply to UV

radiation exposure of photosensitive individuals or of individuals

concomitantly exposed to photosensitizing agents. These exposures

to the eye do not apply to aphakics. (See light and near-infrared TLV for

radiation.) These values should be used as guides in the control of

exposure to continuous sources where the duration of exposure is not

less than 0,1 s. Likewise, these values should not be regarded as a fine

line between safe and dangerous levels.

Annex DVC - (informative) - UV radiation limits:Guidelines from

the American Conference of Governmental Industrial Hygienists

(ACGIH • DVC.2 Recommended values

•

DVC.2.1 The TLVs for occupational exposure to UV radiation incident upon skin

or eye where irradiance values are known and exposure time is controlled are

as follows:

• a) UV-A (315 to 400 nm) radiation to the unprotected eye:

• 1) For exposure times less than 1 000 seconds, the total energy should not

exceed 1 J/cm2 (1 000 mJ/cm2).

• 2) For exposure times greater than 1 000 seconds, the average power level

should not exceed 1 mW/cm2; and no 1 000 second time period should present

a total energy that exceeds 1 J/cm2 (1 000 mJ/cm2).

• b) For monochromatic sources, the TLV for exposure to the unprotected skin

or eye is shown in Table DVC.2.1.1 (also represented in Figure DVC.2.1.1) and

should not be exceeded within an 8-hour period.

• c) For broad-spectrum or multi-peak sources, the TLV for exposure of the

unprotected skin or eye should be calculated based on an effective weighting

formula:

• Eeff = S (El • S l • Dl )

Annex DVD (normative) permanent connection

to MAINS

ND - DVD D2 Addition of a new Annex DVD as follows:

• DVD.1 General

• DVD.1.1 Equipment intended for permanent connection to the mains

shall have provision for connection of a wiring system in accordance

with ANSI/NFPA 70, NEC, with CSA C22.1, CEC, Part I, or with both as

appropriate, and shall meet the requirements of DVD.2 to DVD.3, as

applicable.

• DVD.1.2 Conformity is checked by inspection, and as specified in

DVD.2 to DVD.3.

Annex DVD (normative) permanent connection

to MAINS (Cont’d)

Topics Are:

DVD.2 Wiring TERMINALS and leads e.g.

• DVD.2.1.1 PERMANENTLY CONNECTED EQUIPMENT shall be provided

with TERMINALS or leads for the connection of conductors having an

ampacity that, in accordance with the National Electrical Code and/or the

Canadian Electrical Code, Part I, is acceptable for the equipment.

DVD.3 ENCLOSURE requirements for conduit entry e.g

• DVD.3.1 An ENCLOSURE shall not pull apart or sustain damage such as

cracking and breaking, and knockouts shall remain in place when

subjected to the pulling, torque, and bending that is likely to occur.

DVD.4 Conduit ENCLOSURE entry tests e.g.

• DVD.4.1 Conduit pull-out test

• DVD.4.2 Conduit torque test

• DVD.4.3 Bending

• DVD.4.4 Knockouts

Summary

National Differences for:

• Risk of Electric Shock

• Risk of Fire

• Protection Against Hazards from Fluids

• Components and Subassemblies

• Measuring Circuits

• Annexes

Slide 35

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