Effective September 25, 2016

Standard Information
Standard Number:
UL 507
Standard Name:
Electric Fans
Standard Edition and Issue Date:
9th Edition Dated December 13, 1999
Date of Revision:
October 28, 2014
Date of Previous Revisions to Standard:
9th Edition Dated April 15, 2014
Effective Date of New/Revised Requirements

Effective Date: September 25, 2016

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requests in writing that current requirements be used along with their understanding that their listings will be withdrawn on Effective Date noted above, unless the product is found to comply with new/revised requirements.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(Specific details of new/revised requirements are found in table below):

  • Deletion of paragraph 14.1.4 and revision to 14.1.3 to require a fan to be used only with the cord with which it was supplied.
  • Additional requirement for capacitors
  • Additional requirement for permanence of marking tests
  • Additional requirement for lift motors downdraft temperature test

Fees: So that production of products bearing the Listing Mark will not be interrupted, a quote will be issued for the Applicant to work with their local Intertek Lab to determine the necessary test program, sampling requirement and needed construction details and/or updated marking/instruction details.

Client Action Required:

Submit Information/Samples – The Intertek Engineer will identify what specific information and samples are needed to assist with verification of compliance with current production.

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 – Please immediately identify any current Listing Reports or products that are no longer active and should be removed from our records.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
14InfoPower Supply Connections – Cord-Connected Appliances
14.1 Cords and plugs

Deletion of Paragraph 14.1.4 and Revision to 14.1.3 to Require a Fan be Used Only with the Cord with which it was Supplied.

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

The flexible cord shall either be attached permanently to the appliance or be in the form of a separate cord set with acceptable means for permanent connection to the appliance.
14.1.4 Clause Deleted

An appliance intended for use with a detachable cord set shall not be provided with terminal pins that accommodate a standard flatiron or appliance plug.

New clause added;

A motor starting or running capacitor shall be rated for the appropriate voltage, and with the exception of electrolytic type, the maximum available fault current (AFC) to which it can be subjected, in accordance with the following:

    a) A value of 5,000 A minimum when connected directly across the line;

    b) For capacitors connected in series with a motor coil, the maximum current available to a short-circuited capacitor, when connected in series with the motor coil energized under locked rotor conditions; and

    c) A dry metallized-polypropylene film capacitor operating at less than or equal to 330 VRMS shall not be required to have a maximum AFC rating.
51H New section added;

Permanence of Marking Tests

In addition to complying with Section 62.1 and, after being tested as described in 51H.2 and 51H.3, a tag used for a cautionary marking in accordance with 62.8.1 is considered to be permanently affixed to a power-supply cord if there is no:

    a) Tearing at any point for more than 1/16 in (1.6 mm),

    b) Separation from the power-supply cord,

    c) Shrinkage, deformation, cracking, or other condition that will render the marking on the tag illegible,

    d) Torn or otherwise damaged overlamination. The printing shall remain legible and the overlamination shall remain in place, or

    e) Slippage or movement along the length of the cord set more than 1/2 inch (13 mm) and there shall not be any visible damage to the cord.

To determine compliance with 51H.1, a cord tag shall be conditioned in accordance with (a) - (c). Following the conditioning each sample shall be tested in accordance with 51H.3. If a tag is applied by an adhesive, the conditioning and test are to be conducted no sooner than 25 h after application of the tag.

    a) Three samples, as received, shall be tested in accordance with 51H.3.

    b) Three samples shall be conditioned in an air-circulating oven at 60 ±1°C (140 ±1.8°F) for 240 h followed by 30 min of conditioning at a room temperature of 23 ±2°C (73.4 ±3.6°F) and 50 ±5% relative humidity then followed by the test in 51H.3.

    c) Three samples shall be conditioned for 72 hr at a humidity of 85 ±5% at 32 ±2°C (89.6 ±3.6°F) and followed by test in 51H.3 within 1 min after conditioning.
51H.3 Each sample is to consist of a length of power-supply cord to which the tag has been applied. The power-supply cord, with the attachment plug pointing up, is to be held tautly in a vertical plane. A force of 5 lbf (22.2 N) is to be applied for one minute to the upper-most corner of the tag farthest from the power-supply cord, within 1/4 in (6.4 mm) of the vertical edge of the tag. The force is to be applied vertically downward in a direction parallel to the major axis of the cord. In determining compliance with 51H.1(d), manipulation is permissible, such as straightening of the tag by hand. To determine compliance with 51H.1(d), each sample is to be scraped 10 times across printed areas and edges, with a force of approximately 2 lbf (8.9 N), using the edge of a 5/64-in (2.0-mm) thick steel blade held at a right angle to the test surface.
62InfoGeneral Markings
62.8InfoCord tag markings

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

The markings specified in this section shall be located on a tag attached to the product within 152.4 mm (6 inches) of the face of the attachment plug.The markings specified in this section shall:

    a) Be permanently affixed to an attached power-supply cord,

    b) Be located not more than 6 in (152.4 mm) from the attachment plug,

    c) Be made of substantial material such as cloth, plastic, or the equivalent that provides the necessary mechanical strength and prevents easy removal, and

    d) Comply with the requirements in 51H.1 – 51H.3. The tag shall be of a size that facilitates legibility of the required markings, and all exposed surfaces shall have a clear plastic overlay, or the equivalent, to protect the markings. The tag shall be either of the following forms:

      1) A flag-type tag having a hole to permit securement to the power-supply cord or hose by a plastic strap or equivalent means. The strap shall not be removable without cutting; or

      2) A flag-type tag with a adhesive back. The tag is to be wrapped tightly once around and is to adhere to the supply cord or hose. The ends of the tag are to adhere to each other and project as a flag. The required markings are to be positioned on the projecting flag portion of the tag.
147.1InfoTemperature test
147.1A New section added;

Temperature Test – Lift Motors
147.1A.1 Lift motors shall be subject to 9 complete cycles of operation. A cycle is defined as the action of raising and lowering the downdraft fan through its complete range of motion. These actions are to be performed, without pause between cycles, except that a 5-minute period is to be interposed between the third and fourth cycle and between the sixth and seventh cycles.

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.

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