Effective October 3, 2015

Standard Information
Standard Number:
UL 763
Standard Name:
Motor-Operated Commercial Food Preparing Machines
Standard Edition and Issue Date:
4th Edition Dated January 31, 2012
Date of Revisions:
September 24, 2014
Date of Previous Revisions to Standard:
November 8, 2013
Effective Date of New/Revised Requirements

Effective Date (see Schedule below): October 12, 2015

Impact, Overview, Fees and Action Required

Impact Statement:  A review of all Listing Reports is necessary to determine which products comply with new/revised requirements and which products will require re-evaluation. NOTE:  Effective immediately, this revised standard will be exclusively used for evaluation of new products unless the Applicant requests in writing that current requirements be used along with their understanding that their listings will be withdrawn on Effective Date noted above, unless the product is found to comply with new/revised requirements.

Overview of Changes:  This revision to UL 763 dated September 24, 2014 was issued to incorporate new requirements for filtered ventilation openings and leakage current limit for stationary ice/beverage dispensers with EMI suppression filtering. The added Section 18A is critical to compliance. UL engineers had been applying these requirements as common practice and the standard was finally updated to include. UL has not identified an Effective Date. We will establish 12 months ED. Specific details of new/revised requirements are found in table below.

Schedule:  So that shipping of products with Listing Marks will not be interrupted, an approximateschedule has been established to ensure Listing Reports are found compliant by Effective Date:

  • February 4, 2015 = 8 Month Report Review – Intertek will review all Reports. Update if compliance is verified or issue Findings Letter/Quote for any re-evaluations needed
  • April 3, 2015 = 6 Month Quote Cut-off – Quotes returned for necessary re-evaluations
  • September 4, 2015 = 30 Day Warning – Client advised of all non-compliant Reports to be Suspended
  • October 3, 2015 = Effective Date – ATM Suspended for all non-compliant Reports

Fees:  An initial review of Listing Report (s) will be covered by a direct billing project and will be invoiced at not more than $1000 per report.

Client Action Required:

Information – To assist our Engineer with review of your Listing Reports, please submit technical information in response to the new/revised paragraphs noted in the attached or explain why these new/revised requirements do not apply to your product (s).

Current Listings Not Active? – Please immediately identify any current Listing Reports or products that are no longer active and should be removed from our records. We will do this at no charge as long as Intertek is notified in writing prior to the review of your reports.

Description of New/Revised Technical Requirements

NOTE: Additions to existing requirements are underlined and deletions are shown lined out below.

18AInfoSection newly added:
Air Filters
18A.1 A machine incorporating an air filter over ventilation openings shall be evaluated to determine the effects of a partially or completely blocked air filter. See 33.1.9 and 49A.1.
18A.2 Air filters shall not be located within the electrical enclosure of the machine and shall be located such that propagation of flame from one area to another or bridging between a possible source of ignition and other ignitable parts is unlikely.
18A.3 An air filter intended to be replaced or cleaned by the user shall be readily visible and replaceable without making accessible live parts or mechanical parts that may cause injury to persons. The machine shall be provided with instructions as specified in 59.1 for replacement or cleaning of the filter.
18A.4 An air filter not intended to be replaced or cleaned by the user need not be readily visible or accessible and the instructions of 59.1 need not be provided if the machine complies with the Normal Temperature Test with the filter completely (100%) blocked.
33.1.9 New section added;
In accordance with 18A.1, a machine incorporating an air filter at ventilation openings shall be tested under maximum normal load with a clean filter in place. The test shall be repeated with the air filter blocked 50 percent. For the blocked condition, the 50 percent blockage is stated as a percentage of the total air flow of a new filter through the effective area of the filtered opening. The 50 percent air flow shall be maintained across the effective area of the filtered opening. The filter shall be of the type recommended by the manufacturer and installed in accordance with the instructions. 

Exception: In accordance with 18A.4 and 49A.1, the test may be conducted with a clean filter and with the air filter completely (100%) blocked.

Leakage Current Test
When tested in accordance with 35.3 – 35.8, the leakage current of a cord- and plug-connected ice dispenser or counter-top, portable machine weighing 40 lbs or less, rated for a nominal 120- or 240-volt single-phase supply shall not exceed 0.5 mA. Exception: Those conductive parts of a stationary

New exception added;
Exception: Those conductive parts of a stationary ice dispenser that comply with all of the specifications in items (a) through (d) below shall have a leakage current from simultaneously accessible parts to the grounded supply conductor no greater than 3.5 mA. The leakage current between simultaneously accessible parts shall not exceed 0.5 mA.

  1. The product is provided with electromagnetic interference (EMI) suppression filtering;
  2. The product is equipped with a grounding-type supply cord and plug;
  3. The product is not intended for outdoor installation; and
  4. It is considered unlikely that high leakage conductive parts will be contacted during normal use.
  1. The front of an ice dispenser is considered likely to be contacted in normal use.
  2. The recessed area where ice or beverages are dispensed (backsplash surround) is considered an area unlikely to be contacted during normal use.
  3. The sides of an ice dispenser are considered likely to be contacted in normal use, unless installation instructions are provided for installing in a manner that the sides are protected from unintentional contact, such as in a recessed area.
  4. The cover of a manually-filled ice hopper is considered likely to be contacted in normal use when refilling the ice hopper.
49A Section newly added:
Abnormal Filter Blockage Test

A machine incorporating an air filter over ventilation openings shall be tested as described in 49A.2– 49A.5, and as a result of the testing, there shall be no:

  1. Emission of flame or molten metal;
  2. Glowing or flaming of the tissue paper covered supporting surface or the cheesecloth covering the machine;
  3. Opening of the 3 A fuse between accessible metal parts and ground;
  4. Dielectric breakdown;
  5. Exposure of live parts; or
  6. Exposure of a mechanical parts that could cause injury to persons.

Exception: The Abnormal Filter Blockage Test need not be conducted if the machine complies with the Normal Temperature Test with the filter completely (100%) blocked.


A machine shall be operated as described in 49A.4 under each of the following conditions, in turn:

  1. Blocked 75%; and
  2. Blocked 100%.
49A.3 Each blockage is stated as a percentage of the total effective area of the filtered opening and shall be representative of the most severe and likely condition based upon the ventilation design.

The machine shall be installed and operated as described in 33.1 – 33.21, as applicable. The machine shall be:

  1. Connected to a supply circuit as described in 30.1;
  2. Placed on a white tissue paper covered softwood surface;
  3. Draped with a double layer of cheesecloth over the whole machine with the cloth within 1/8 inch (3.2 mm) of the openings (if any) in the enclosure; and
  4. Grounded by means of a 3 A non-time-delay plug fuse connected between exposed metal parts and earth ground.
49A.5 Following operation as specified in 49A.4, the machine shall comply with Accessibility of Live Parts, Section 10, and Protection Against Injury to Persons, Sections 19, 20 and 21; and be subjected to the Dielectric Voltage-Withstand Test, Section 34.
59InfoSection newly added:

In accordance with 18A.3, a machine provided with an air filter intended to be replaced or cleaned shall include instructions indicating how to:

  1. Determine when the filter needs replacement or cleaning;
  2. Obtain a proper replacement filter; and
  3. Replace or clean the filter.

Exception: The instructions need not be provided if the machine complies with the Normal Temperature Test with the filter completely (100%) blocked.

CUSTOMERS PLEASE NOTE: This Table and column "Verdict" can be used in determining how your current or future production is or will be in compliance with new/revised requirements.

Contact Intertek