There are two common categories for Air Filter Units in UL Certification. Please see the followings for reference:
- UL Standard: UL 586 - Use: This category covers high-efficiency particulate air-filter units of the throw-away type intended for removal of very fine particulate from the air of industrial and laboratory exhaust and ventilating systems.
- UL Standard: UL 900 - Use: This category covers air-filter units of both washable and throw-away types intended for the removal of dust and other airborne particles from air circulated mechanically in equipment and systems installed in accordance with ANSI/NFPA 90A, ANSI/NFPA 90B, the "International Mechanical Code", "International Fire Code" and "Uniform Mechanical Code". [Note] - UL 586 - Standard for Safety High-Efficiency, Particulate, Air Filter Units - UL 900 - Standard for Safety Air Filter Units GCS Safety Team
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UL 508C is going to be withdrawn and will be replaced by UL 61800-5-1!
After 2020-02-01, the UL 61800-5-1 will be the only Standard available for such products investigation, but products that were certified to UL 508C may remain certified after the withdrawal of UL 508C without an investigation to UL 61800-5-1. There will be no UL Industry File Review (IFR) for products that certified to UL 508C. [Note] - UL 508C: Power Conversion Equipment - UL 61800-5-1: Adjustable Speed Electrical Power Drive Systems – Part 5-1: Safety Requirements – Electrical, Thermal and Energy GCS Safety Team The clearance and creepage distance for basic insulation and functional insulation are different, do you know the definitions of them?
Ex: the distance for basic insulation - like the distance between live part and accessible earthed metal part.
Ex: the distance for functional insulation - like the distance between two live parts. [Note] Ref: IEC/EN 60335-1
GCS Safety Team Whether UL Type L Service is UL Listing Service? Do you know the different from them?
UL Type L Service is not UL Listing Service, please the followings for reference:
[Note]
GCS Safety Team There are two common CCNs for Label in UL Certification, one is PGDQ2, the other is PGJI2. Do you know the different from them?
This category covers finished printed adhesive-attached labels that intended to provide warnings, instructions and other information subject to permanence of marking requirements.
This category covers adhesive-attached label materials, and printed labels that have been investigated in combination with specific inks for adding information to the label materials using compatible printing equipment. Only unprinted (blank) areas of the label material are suitable for additional printing, except where otherwise specified. The labels are intended to provide warnings, instructions and other information subject to permanence of marking requirements. [Note]
GCS Safety Team There are two common CCNs for Printed Wiring Boards (PWB) in UL Certification, one is QMTS2, the other is ZPMV2. Do you know the different from them?
Polymeric Materials – Filament-wound Tubing, Industrial Laminates, Vulcanized Fiber, and Materials for Use in Fabricating Recognized Printed Wiring Boards Generally speaking, these materials are for use in fabricating Recognized printed wiring boards (PWB). The printed wiring boards (PWB) manufacturer need to use the qualified QMTS2 for their printed wiring.
Wiring, Printed The category covers printed wiring boards intended for use as components in devices or appliances. The end products manufacturer needs to use the qualified ZPMV2 printed wiring boards (PWB) in their products. [Note]
- UL 94, Tests for Flammability of Plastic Materials for Parts in Devices and Appliances - UL 746F, Polymeric Materials - Flexible Dielectric Film Materials for Use in Printed-Wiring Boards and Flexible Materials Interconnect Constructions.
- UL 796F, Flexible Materials Interconnect Constructions GCS Safety Team The basic definitions for Insulation in Product Safety Standards:
(1 Double insulation = 1 Basic insulation + 1 Supplementary insulation)
(1 Reinforced Insulation effect = 1 Double insulation effect) [Note] live part conductive part which may cause an electric shock in normal use. GCS Safety Team In product safety certification, if the product contains the following safety critical components, enclosures and materials, it must be the safety approved and suitable for the intended application:
- Power Supply Cord - Internal Wiring - Switch - PWB - Plastic Material - Insulating Sheet - Adhesive/ Silicone Sealant - Current Fuse - Thermal Fuse - Fusing Resistor - Thermal protector, Thermistor, NTC/PTC - X, Y Capacitor - Photo coupler - Connector/ Terminal Block - Varistor - Magnet wire GCS Safety Team The product needs to provide relative caution marking and name plate, per Safety Standard and Certification body requirements, when it passed the safety tests and got the Certification.
In the UL Certification products, if the caution marking or name plate is marked by labeling, the following items should be noted: 1. Use the UL Recognized label; 2. UL Label ratings need to fit the product’s following conditions: a_ Max. Temp. & Min. Temp. b_ Indoor or Outdoor c_ Application surface d_ Additional conditions You could find above information on UL web. site, and you need to confirm all information before buying and using your UL Labels! [Note] UL Standard - UL 969, Marking and Labeling Systems. (GCS Safety Team) 5G, the next generation of mobile technology, will be predicted to greatly benefit Internet of Things (IOT) innovation.
In 2017, UL issued the Standard UL 2900 Series for network-connectable products that contain software. UL 2900 Series Standards contain requirements about evaluating and testing for vulnerabilities, software weaknesses and malware of a network-connectable product. In new mobile technology generation, you may need to know. [Note] UL 2900-1: Standard for Software Cybersecurity for Network-Connectable Products, Part 1: General Requirements (GCS Safety Team) |