Control Project Checklist

Help prevent delays during your upcoming control investigation. The following lists the items causing the most common delays. Please ensure all necessary relevant information below is provided when submitting your project.

Category	Tips
Plastic Material	Provide thickness, make and model number of plastic used for any housing, barrier and plastics that are in direct support of live parts. Check the online UL Plastic Database to ensure your plastic has the correct properties for its location.
Connectors and Headers	Please provide the specification sheets for any connectors and headers that are employed in the device.
Power Supply	Please confirm with the engineer if the energy derived from the power supply feeding your device must be SELV or Class 2.
Lab	Provide clear direction on the operation of the control - sensor inputs and associated hardware (i.e. temp sensor, etc) to enable control operation - whether to cycle outputs or operate in continuous "on" mode. Lack of this information may cause delays in getting your tests started properly. Most common lab test non-compliances Temperature Tests - components exceeding limits. Component fault failures Overload and Endurance failures of relays and triacs.
Ratings	Prior to submitting, ensure the ratings of your control have been finalized. We often receive requests to change ratings during an investigation which causes delays in modifying datasheets and reports.
Bill of Materials	Provide a complete bill of material that along with manufacturer and part number includes file number references for UL Recognized components. This greatly reduces the time needed to verify Recognition and ratings.
Transformers (Switching)	Provide the manufacturing illustration/diagram for any switching transformer employed. It is highly recommended to conduct pretesting prior to submittal via CoR or thermocouple method for all windings. If any winding temperature is over 100C for UL 60730 or 110C for UL 873 using the CoR method (or 90 deg C for UL 873 / UL 60730 when using the thermocouple method), a suitable Recognized (OBJY2) insulation system may be required within the transformer construction. This also applies to relay coils. Provide construction information including the UL Recognized Insulation System File Number, Insulation Class and Designation.
Relays	When using relays, ensure they are suitable for the application. The relay should be UL Recognized for the Type of Load (Resistive, Motor, Ballast, etc.), the Size of the load in amperage and for the proper Ambient of your device. Not having the proper relays can lead to longer testing and additional Follow Up expenses. Confirm with your relay supplier the device has the appropriate UL Recognition ratings. Often additional ratings are shown on sales sheets for relays that are not part of the UL Recognized ratings.
Component Recognitions	Verify the UL Recognition of the critical components in your device by using the UL Online Certification Database
Report Modifications	When submitting alternate construction requests, include a marked up copy of the current UL Report using track changes. This will help ensure the UL engineer fully understands the modifications requested and avoids miscommunication.
Referencing Previous Investigations	When referencing previous investigation work for use in a new project, provide the File, Volume, Section, Model and Report Date of the File being referenced.
Document Attachments	Provide drawings, schematics, diagrams, bill of materials, etc. in separate documents with names stating what they are. This will help our customer service and engineer staff to easily determine we have received all items necessary to begin your investigation.
Alternate Components	Declare any alternate components needed for your product at the beginning of the investigation. Declaring components during the investigation causes delays with constructional analysis and/or datasheets having to be re-addressed.
Voltage Maps	Provide colored voltage maps of PWB schematics showing all opposite polarity. This also serves as a self check to ensure proper spacings have been applied to the design.

Additional items for electronic protective / safety controls

Product Submittal Information Forms

General Control Investigation

New Electromechanical Controls

New Electronic Controls

Revised Electromechanical Controls

Revised Electronic Controls