Category Archives: UL

UL 296

Oil Burners

Published by: 2017-02-24 / 2017-02-24
Please note: All interim revisions for this edition available at time of your purchase will be included.

1 Scope
1.1 These requirements cover oil burners intended for firing appliances and devices such as boilers; central, floor, wall, and special furnaces; storage tank water, air, and direct-fired air heater units; and ovens. These burners are required to be equipped with automatic primary safety controls to restrict abnormal discharge of oil at the burner in case of ignition failure or flame failure.

1.2 Requirements for the installation and use of oil-burning equipment are included in the National Fire Protection Association Standard for the Installation of Oil-Burning Equipment, NFPA 31. These heaters are intended for installation in accordance with codes such as the BOCA National Mechanical Code, the Standard Mechanical Code, and the Uniform Mechanical Code.

Ordering and availability

This publication is available only in printed edition.

UL 295

Standard for Commercial-Industrial Gas Burners

Published by: 2017-02-08 / 2017-02-08
Please note: All interim revisions for this edition available at time of your purchase will be included.

1 Scope

1.1 These requirements cover commercial-industrial gas burners with input ratings over 400,000 Btu per hour (117.23 kW) intended for installation in heating equipment such as, but not limited to, appliances, furnaces, heaters, ovens, water heaters, and incinerators. These gas burners are required to be equipped with integral automatic primary safety controls to restrict the abnormal flow of gaseous fuel in case of ignition failure and/or flame failure.

1.2 Additional installation and operation requirements are available for commercial-industrial gas burners, as defined by the National Fuel Gas Code, NFPA 54 and by the Liquefied Petroleum Gas Code, NFPA 58, as applicable.

Ordering and availability

This publication is available only in printed edition.

UL 1709

Rapid Rise Fire Tests of Protection Materials for Structural Steel

Published by: 2017-02-24 / 2017-02-24
Please note: All interim revisions for this edition available at time of your purchase will be included.

1 Scope
1.1 This standard describes a test method for measuring the resistance of protective materials to rapid-temperature-rise fires.

1.2 The test method covers a full-scale fire exposure, intended to evaluate the thermal resistance of protective material applied to structural members and the ability of the protective material to withstand the fire exposure.

1.3 The standard describes the minimum testing requirements for classification, the limits of applicability of test results and acceptable methodology to determine the classification achieved.

1.4 The test method includes a supplementary test method for beams, intended to evaluate the ability of protective materials to perform when subject to significant deflections, for use in conjunction with the full-scale exposure test and applicable for beams and other sections subject to bending. Information published in accordance with this test method may also include product design tables for beams and sections subject to bending derived from the supplementary test method and accompanying methodology.

1.5 Information published in accordance with this test method may also include supplementary product design tables for alternate limiting temperatures derived from a multi-temperature analysis. Such tables are provided to aide in conditions where a performance-based-design approach is implemented, but are not part of the classification.

Ordering and availability

This publication is available only in printed edition.

UL 60730-2-9

Automatic Electrical Controls – Part 2-9: Particular Requirements for Temperature Sensing Controls

Published by: 2017-02-14 / 2017-02-14
Please note: All interim revisions for this edition available at time of your purchase will be included.

1 Scope and normative references
This clause of part 1 is applicable except as follows:

1.1 Scope
Replacement:
This part of IEC 60730 applies to automatic electrical temperature SENSING CONTROLS for use in, on or in association with equipment, including ELECTRICAL CONTROLS for heating, air-conditioning and similar applications. The equipment may use electricity, gas, oil, solid fuel, solar thermal energy, etc., or a combination thereof.
NOTE Throughout this standard, the word “equipment” includes “appliance” and “control system”.
This standard is applicable to automatic electrical temperature SENSING CONTROLS forming part of a building automation CONTROL SYSTEM within the scope of ISO 16484.
This standard also applies to automatic electrical temperature SENSING CONTROLS for equipment that may be used by the public, such as equipment intended to be used in shops, offices, hospitals, farms and commercial and industrial applications.
This standard does not apply to automatic electrical temperature SENSING CONTROLS intended exclusively for industrial process applications, unless explicitly mentioned in the relevant equipment standard.

1.1.1
Replacement:
This standard applies to the inherent safety, to the OPERATING VALUES, OPERATING TIMES, and OPERATING SEQUENCES where such are associated with equipment safety, and to the testing of automatic electrical temperature SENSING CONTROL devices used in, or in association with, equipment.
NOTE Examples of such CONTROLS include BOILER THERMOSTATS, FAN CONTROLS, TEMPERATURE LIMITERS and THERMAL CUT-OUTS.
This standard is also applicable to the functional safety of low complexity safety-related temperature SENSING CONTROLS and SYSTEMS.

1.1.2
Addition:
This standard also applies to the electrical safety of temperature sensing controls with nonelectrical outputs such as refrigerant flow and gas CONTROLS.

1.1.3 Not applicable.

1.1.4
Replacement:
This standard applies to MANUAL CONTROLS when such are electrically and/or mechanically integral with automatic temperature SENSING CONTROLS.
NOTE Requirements for manual switches not forming part of an AUTOMATIC CONTROL are contained in IEC 61058-1.

1.1.5
Replacement:
This standard applies to a.c. or d.c. powered temperature SENSING CONTROLS with a rated voltage not exceeding 690 V a.c. or 600 V d.c.

1.1.6
Replacement:
This standard does not take into account the RESPONSE VALUE of an AUTOMATIC ACTION of a temperature SENSING CONTROL, if such a RESPONSE VALUE is dependent upon the method of mounting it in the equipment. Where a RESPONSE VALUE is of significant purpose for the protection of the USER, or surroundings, the value defined in the appropriate equipment standard or as determined by the manufacturer shall apply.

1.1.7
Replacement:
This standard applies also to temperature SENSING CONTROLS incorporating ELECTRONIC DEVICES, requirements for which are contained in Annex h and to temperature SENSING CONTROLS using NTC THERMISTORS or PTC THERMISTORS, requirements for which are contained in Annex j.
Additional subclause:
1.1.101 This standard applies to SINGLE OPERATION DEVICES as defined in this standard.

1.1.101DV Modify text of 1.1.101 with the following:
This standard applies to single operation devices, thermostats for drip-type coffee makers, self-heating thermal protectors (SHTP) for recessed lighting fixtures, and Fan/Heat sequencers as defined in this standard.

1.2 Normative references
Addition:
IEC 60216-1:2013, Electrical insulating materials – Thermal endurance properties – Part 1: Ageing procedures and evaluation of test results
IEC 60691, Thermal links – Requirements and application guide
IEC 60730-2-4, Automatic electrical controls for household and similar use – Part 2-4: Particular requirements for thermal motor protectors for motor-compressors of hermetic and semi-hermetic type

Ordering and availability

This publication is available only in printed edition.

UL 60034-2-1

Rotating Electrical Machines – Part 2-1: Standard methods for determining losses and efficiency from tests (excluding machines for traction vehicles)

Published by: 2017-02-21 / 2017-02-21
Please note: All interim revisions for this edition available at time of your purchase will be included.

Scope
This part of IEC 60034 is intended to establish methods of determining efficiencies from tests, and also to specify methods of obtaining specific losses.
This standard applies to d.c. machines and to a.c. synchronous and induction machines of all sizes within the scope of IEC 60034-1.
NOTE These methods may be applied to other types of machines such as rotary converters, a.c. commutator motors and single-phase induction motors.

Ordering and availability

This publication is available only in printed edition.

UL 62093

Balance-of-System Components for Photovoltaic Systems – Design Qualification Natural Environments

Published by: 2017-02-24 / 2017-02-24
Please note: All interim revisions for this edition available at time of your purchase will be included.

Scope and object
This International Standard establishes requirements for the design qualification of balance-of-system (BOS) components used in terrestrial photovoltaic (PV) systems. This standard is suitable for operation in indoor, conditioned or unconditioned; or outdoor in general open-air climates as defined in IEC 60721-2-1, protected or unprotected. It is written for dedicated solar components such as batteries, inverters, charge controllers, system diode packages, heat sinks, surge protectors, system junction boxes, maximum power point tracking devices and switch gear, but may be applicable to other BOS system components.

This standard is based on that which is specified in IEC 61215 and IEC 61646 for the design qualification of PV modules. However, changes have been made to account for the special features of the balance-of-system components, and to add different levels of severity for the different service environments. Dust, fungus, insects, shipping vibration and shock, and protection class have been added to the appropriate environmental categories. The high and low temperature and humidity limits have also been modified for the appropriate service environments.

This standard does not apply to photovoltaic modules. These are covered by IEC 61215 or IEC 61646. Also, this standard does not apply to concentrator modules or to complete PV systems. Specific electrical safety aspects are not part of this standard.

This standard is applicable to lead-acid and nickel-cadmium cells and batteries. Other electrochemical storage systems will be included when they become available.

The object of this test sequence is to determine the performance characteristics of each BOS components and to show, as far as possible within reasonable constraints of cost and time, that the component is capable of maintaining this performance after exposure to the simulated service natural environmental conditions for which it is intended to be applicable as specified by the manufacturer. The actual life expectancy of components so qualified will depend on their design, their environment and the system conditions under which they are operated.

Ordering and availability

This publication is available only in printed edition.

UL 60079-7

Explosive Atmospheres – Part 7: Equipment Protection by Increased Safety ”e”

Published by: 2017-02-24 / 2017-02-24
Please note: All interim revisions for this edition available at time of your purchase will be included.

Scope


1DV.1 Modification of Clause 1, first paragraph to replace with the following:
1DV.1.1 This part of IEC 60079 standard specifies the requirements for the design, construction, testing and marking of electrical equipment and Ex Components with type of protection increased safety “e” intended for use in explosive gas atmospheres.

Electrical equipment and Ex Components of type of protection increased safety “e” are either:
a) Level of Protection
“eb” (EPL “Mb” or “Gb”); or
b) Level of Protection “ec” (EPL “Gc”)
Level of Protection “eb” applies to equipment or Ex Components, including their connections, conductors, windings, lamps, and batteries; but not including semiconductors or electrolytic capacitors.
NOTE 1 The use of electronic components, such as semiconductors or electrolytic capacitors, is excluded from Level of Protection “eb” as expected malfunctions could result in excessive temperatures or arcs and sparks if the internal separation distances were not applied. It is not generally practical to maintain those separation distances and maintain the function of the electronic component.
Level of Protection “ec” applies to equipment or Ex Components, including their connections, conductors, windings, lamps, and batteries; and also including semiconductors and electrolytic capacitors.
NOTE 2 The use of electronic components, such as semiconductors or electrolytic capacitors, is permitted in Level of Protection “ec” as these are evaluated under both normal conditions and regular expected occurrences, and are not likely to result in excessive temperatures or arcs and sparks. As the requirements for separation distances are not applied to the internal construction, commercially available electronic components are generally suitable if the external separation distances comply.
The requirements of this standard apply to both Levels of Protection unless otherwise stated.
For Level of Protection “eb”, this standard applies to electrical equipment where the rated voltage does not exceed 11 kV r.m.s., a.c. or d.c.
For Level of Protection “ec”, this standard applies to electrical equipment where the rated voltage does not exceed 15 kV r.m.s., a.c. or d.c.
NOTE 3 Short circuit currents flowing through increased safety connections of mains circuits are not considered to create a significant risk of ignition of an explosive gas atmosphere due to movement of connections as a result of mechanical stresses created by the short circuit current. Normal industrial standards require that the effects of short time high currents on the security of connections be considered. The presence of the explosive gas atmosphere does not adversely affect the security of the connection.
NOTE 4 Any short term thermal excursions that occur as a result of electrical current excursions above normal rated currents, such as those that occur during the starting of motors, are not considered to create a significant risk of ignition of an explosive gas atmosphere due to the relatively short duration of the event and the convection that occurs during the event.
NOTE 5 High-voltage connections and associated wiring (above 1 kV) can be susceptible to increased partial discharge activity that could be a source of ignition. Increased spacings to earthed surfaces or other connections and provision of suitable high-voltage stress relief for the terminations are typically provided.


1DV.2 Modification of Clause 1, eighth paragraph to replace with the following:
1DV.2.1 This standard supplements and modifies the general requirements of IEC 60079-0 UL 60079-0. Where a requirement of this standard conflicts with a requirement of IEC 60079-0 UL 60079-0, the requirement of this standard takes precedence.

1DV.3 Addition of 1DV.3.1
Where references are made to other IEC 60079 standards, the referenced requirements found in these standards apply as modified by any applicable U.S. National Differences.

Ordering and availability

This publication is available only in printed edition.

UL 60947-7-1

Low-voltage switchgear and controlgear – Part 7-1: Ancillary equipment – Terminal blocks for copper conductors

Published by: 2017-01-27 / 2017-01-27
1.1 Scope
This part of IEC 60947 specifies requirements for terminal blocks with screw-type or screw-less-type clamping units primarily intended for industrial or similar use and to be fixed to a support to provide electrical and mechanical connection between copper conductors. It applies to terminal blocks intended to connect round copper conductors, with or without special preparation, having a cross-section between 0,2 mm2 and 300 mm2 (AWG 24/600 kcmil), intended to be used in circuits of a rated voltage not exceeding 1 000 V a.c. up to 1 000 Hz or 1 500 V d.c.
NOTE AWG is the abbreviation of “American Wire Gage” (Gage (US) = Gauge (UK))
kcmil = 1000 cmil;
1 cmil = 1 circular mil = surface of a circle having a diameter of 1 mil
1 mil = 1/1000 inch
This standard may be used as a guide for


– terminal blocks requiring the fixing of special devices to the conductors, for example quick connect terminations or wrapped connections, etc.;
– terminal blocks providing direct contact to the conductors by means of edges or points penetrating the insulation, for example insulation displacement connections, etc.;
– special types of terminal blocks, for example disconnect terminal blocks, etc.

Where applicable in this standard, the term “clamping unit” has been used instead of the term “terminal”. This is taken into account in case of reference to IEC 60947-1.

1.1DV Modification to add the following:
1.1DV.1 This standard specifies requirements for terminal blocks with screw-type or screw-less-type clamping units primarily intended for industrial or similar use and to be fixed to a support, in accordance with Annex DVB, National Electrical Code, NFPA 70 (for use in the USA), or CSA C22.1 – 15 Canadian Electrical Code, Part I (for use in Canada), and NOM-001-SEDE, Electrical Installations (Utility) ([for use in Mexico]).
1.1DV.2 The wire range for terminal blocks covered by this standard include 0,051 mm2 to 1 010 mm2 (30 AWG to 2 000 kcmil) copper conductors and 3,31 mm2 to 1 010 mm2 (12 AWG to 2 000 kcmil) aluminum conductors. See Annex DVA for aluminum requirements.
In Mexico, 3,31 mm2 (12 AWG), 5,26 mm2 (10 AWG), and 8,37 mm2 (8 AWG) aluminum conductors are not allowed.
1.1DV.3 The voltage range includes up to 1 500 Vac and 1 500 Vdc.

Ordering and availability

This publication is available only in printed edition.

UL 1993

Self-Ballasted Lamps and Lamp Adapters

Published by: 2017-01-27 / 2017-01-27
Please note: All interim revisions for this edition available at time of your purchase will be included.

1 Scope
1.1 These requirements are intended to cover both self-ballasted lamps and self-ballasted lamp adapters rated 120 to 347 V AC nominal for connection to screw-base, pin-base, or recessed single contact (RSC or R7) lampholders. These devices are intended for use in accordance with the National Electrical Code, ANSI/NFPA 70, and the Canadian Electrical Code Part I, CSA C22.1, in non-hazardous locations, and the Instalaciones Electricas (utilizacion), NOM-001-SEDE.

1.2 These devices incorporate resistance, reactance, or electronic (solid-state) type ballasts or power supplies. These devices employ various lamp technologies including, but not limited to, incandescent, fluorescent, high-intensity discharge lamps, light-emitting diodes.

1.3 These requirements also include Supplemental Requirements for Light-Emitting Diodes (LED), Supplement sa, for:

a) Self-contained LED lamps, rated 120 to 347 V AC nominal for connection to screw-, pin-base, and recessed single contact (RSC or R7) lampholders,
b) Lamps for replacement of an ANSI standardized fluorescent lamp, and consisting of light-emitting-diode (LED) lamp technologies, with control circuitry, and a driver or power supply. The LED driver and control circuitry will be either integral with the lamp or remote from the lamp, and
c) Component LED lamps, with or without control circuitry, an ANSI base other than bases mentioned in (a), for connection to LED driver having a low voltage output, such as replacement for tungsten-halogen, MR11 and MR16 shaped lamps.

1.4 This standard does not apply to medium-to-medium base (E26) fittings that incorporate controls such as photocells, motion detectors, radio controls, or dimmers covered by other standards.

1.5 These devices are not intended for use with emergency exit fixtures or emergency exit lights.

Ordering and availability

This publication is available only in printed edition.

UL 60947-7-3

Low-Voltage Switchgear and Controlgear – Part 7-3: Ancillary Equipment – Safety Requirements for Fuse Terminal Blocks

Published by: 2017-01-27 / 2017-01-27
1.1 Scope
This part of IEC 60947 applies to fuse terminal blocks with screw-type or screwless-type clamping units for the connection of rigid (solid or stranded) or flexible copper conductors for the reception of cartridge fuse-links in accordance with IEC 60127-2, intended primarily for industrial or similar use in circuits not exceeding 1 000 V a.c., up to 1 000 Hz or 1 500 V d.c., and having a maximum short-circuit breaking capacity of 1 500 A.
They are intended for installation in electrical equipment with enclosures which surround the fuse terminal blocks to such an extent that they are accessible only with the aid of a tool.
For certain applications, for example in control circuits, the fuse terminal blocks may be designed exclusively for short-circuit protection.
NOTE This standard may be used as a guide for fuse terminal blocks for the reception of special cartridge fuse- links which do not meet the requirements of IEC 60127-2.
The object of this standard is to specify safety requirements and test methods for the mechanical, electrical and thermal characteristics of fuse terminal’ blocks, to ensure the compatibility between terminal blocks and standardized fuse-links.
This standard may be used as a guide for


– fuse terminal blocks requiring the fixing of special devices to the conductors, for example quick connect terminations or wrapped connections, etc.;
– fuse terminal blocks providing direct contact to the conductors by means of edges or points penetrating the insulation, for example insulation displacement connections, etc.

Where applicable in this standard, the term “clamping unit” has been used instead of the term “terminal”. This is taken into account in case of reference to IEC 60947-1.


1.1DV Modification by adding the following:
This standard specifies requirements for fuse terminal blocks with screw-type or screwless-type clamping units for the connection of rigid (solid or stranded) or flexible copper conductors for the reception of cartridge fuse-links, in accordance with Annex DVB, National Electrical Code, NFPA 70 (for use in the USA), CSA C22.1 – 15 Canadian Electrical Code, Part I (for use in Canada), and NOM-001-SEDE, Electrical Installations (Utility) [for use in Mexico].

Ordering and availability

This publication is available only in printed edition.