UL 1449 Rev 03262015, Surge Protective Devices

Effective March 11, 2016

Standard Information
Standard Number:
UL 1449
Standard Name:
Surge Protective Devices
Standard Edition and Issue Date:
4th Edition Dated August 20, 2014
Revision Date:
March 26, 2015
Date of Previous Revisions to Standard:
4th Edition Dated August 20, 2014
 
Effective Date of New/Revised Requirements

Effective Date (see Schedule below): March 11, 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requests in writing that current requirements be used along with their understanding that their listings will be withdrawn on Effective Date noted above, unless the product is found to comply with new/revised requirements.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: UL 1449 4th edition was revised to incorporate new/revised requirements pertaining to the construction, testing, marking and instruction manual. Specific details of new/revised requirements are found in table below.

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 – Please immediately identify any current Listing Reports or products that are no longer active and should be removed from our records.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
ClauseVerdictComment
6InfoGeneral (CONSTRUCTION)
6.5 New clause added;

A Type 3 SPD intended for outdoor use shall not exceed 0.45 m (18 in.) in length including the cord and plug, and shall be constructed such that the Enclosure does not obstruct a receptacle hood when in use.
7InfoEnclosure
7.2InfoType 3 SPD Cord-Connected
7.2.1.5 New clause added;

An SPD intended for outdoor use shall comply with the applicable performance requirements for a Type 3R enclosure as specified in the Standard for Electrical Equipment, Environmental Considerations, UL 50E.
7.2.3.1 

Additions to existing requirements are underlined

A nonmetallic enclosure shall comply with the applicable mechanical/electrical property considerations, flammability and thermal requirements for non-attended, non-intermittent duty portable equipment as specified in the Standard for Polymeric Materials– Use in Electrical Equipment Evaluations, UL 746C.

Exception: A rack-mounted cord-connected Type 3 SPD intended for use in stationary equipment shall comply with the flammability requirements in the Standard for Polymeric Materials – Use in Electrical Equipment Evaluations, UL 746C, for stationary equipment.
7.2.3.3 New clause added;

An SPD intended for outdoor use having a nonmetallic enclosure shall additionally comply with the Water Resistance and UV exposure requirements specified in the Standard for Polymeric Materials–Use in Electrical Equipment Evaluations, UL 746C.
7.3InfoType 3 SPD Direct Plug-In
7.3.1.6 New clause added;

An SPD intended for outdoor use shall comply with the applicable performance requirements for a Type 3R enclosure as specified in the Standard for Electrical Equipment, Environmental Considerations, UL 50E.
7.3.1.7 New clause added;

A nonmetallic enclosure intended for outdoor use shall additionally comply with the Water
Resistance and UV exposure requirements specified in the Standard for Polymeric Materials– Use in Electrical Equipment Evaluations, UL 746C.
14InfoSupply Connections
14.2InfoType 3 SPD — Cord Connected
14.2.1.2 

Additions to existing requirements are underlined

The flexible cord shall be Type S, SO, ST, SJ, STO, SJO, SJT, SJTO or shall be a type at least as serviceable for the particular application. Outdoor use products shall include ²W² suffix.
 

Exception: SPT-3 or SP-3 may be used on an SPD rated 15 A, or less, if marked in accordance with 80.15.
14.2.1.5 

Additions to existing requirements are underlined

The length of a supply cord measured from the outside surface of the enclosure of a SPD to the plane of the face of the attachment plug shall not be less than 0.45 m (1.5 ft) or be more than 7.6 m (25ft.).

Exception No. 1: SPDs with only one or two receptacles are not required to comply with the minimum supply cord length.

Exception No. 2: For an SPD intended for outdoor use, the length of the supply cord measured from the outside surface of the enclosure to the plane of the face of the attachment plug shall be not less than 0.15 m (6 in).
15InfoMounting
15.2InfoType 3 SPD — Cord Connected
15.2.7 New clause added;

A rack-mounted cord-connected Type 3 SPD is able to employ mounting means to secure the SPD to portable or stationary equipment.
16 Receptacles
16.12 New clause added;

A receptacle used in an SPD intended for outdoor use shall be comply with the outdoor use requirements in the Standard for Attachment Plugs and Receptacles, UL 498.
16.13 New clause added;

A receptacle used in an SPD intended for outdoor use shall be provided with a receptacle hood which is weather-proof with an attachment plug cap inserted or removed.
36InfoGeneral (TEST PROGRAM)
36.2InfoTest environment and general sample discussion
36.2.4 New clause added;

When the use of cheesecloth is specified, the cloth to be used is to be bleached cheesecloth running 14 – 15 yd2/lb (approximately 26 – 28 m2/kg) and having what is known as a count of 32 by 28, that is, for any square inch, 32 threads in one direction and 28 threads in the other direction (for any square centimeter, 13 threads by 11 threads).
36.2.5 New clause added;

When the use of tissue paper is specified, the paper shall be white wrapping paper of grammage generally between 12 g/m2 and 30 g/m2.
37InfoLeakage Current Test – Type 3 SPDs Only
37.7 

Additions to existing requirements are underlined

A sample of the SPD is to be tested for leakage current starting with the as-received condition – as received being without prior energization except as may occur as part of the production-line testing – but with its grounding conductor circuit open at the test receptacle. An SPD intended for outdoor use shall additionally be subjected to the leakage current test following a 48 hour humidity conditioning of air having a relative humidity of 88 ±2 percent at a temperature of 32 ±2°C (90 ±4°F). Immediately following the humidity conditioning, the sample is to be removed from the humidity chamber and tested as noted below. The supply voltage is to be adjusted to:

a) 120 V for an SPD rated between 110 and 120 V;

b) 240 V for an SPD rated between 220 and 240 V; and

c) The rated voltage marked on the SPD for any other voltage.

The test sequence with reference to the appropriate measuring circuit is to be as follows:

d) For single-phase SPDs,

1) Using the appropriate circuit from Figure 37.1and, with switch S1 open, the SPD is to be connected to the measuring circuit. Leakage current is to be measured using both positions of switch S2.

2) Switch S1 is then to be closed energizing the SPD and, within a period of 5 seconds, the leakage current is to be measured using both positions of switch S2.

3) The leakage current is to be monitored until the leakage current stabilizes or decreases. Both positions of switch S2 are to be used in determining this measurement.

e) For three-phase SPD, the measurements are to be made when the leakage current has stabilized using Figure 37.2, with each of the switches SA, SB and SC open in turn and the other two switches closed. The SPD enclosure or other dead metal parts intended to be grounded are not to be connected to ground, except through the measuring circuit during the test.

Exception: For products known to be sensitive to instantaneous changes in polarity, the leakage current test shall be repeated in the reverse polarity condition.
51InfoWithstand Test
51.12 New clause added;

Test Setup and Apparatus – The representative devices shall be placed on a softwood surface covered with a double layer of white tissue paper. The orientation of the representative device shall be such as to create the most severe conditions representative of normal installation. Each representative device is to be loosely draped with a double layer of cheesecloth. The cheesecloth shall cover openings (for example, receptacle openings, ventilation openings) where flame, molten metal, or other particles may be expelled as a result of the test. However, the cheesecloth shall not be deliberately pushed into openings.
Table 61.2 

New table added;

Low-temperature steel sphere impact test – Temperature Conditioning Requirements

73A New Section added;

Vibration test
73A.1 A Type 3 SPD intended for outdoor use shall be subjected to the vibration test described in 73A.2. After the test:

a) There shall be no loosening of parts, and

b) The device shall comply with the requirements in Sections 37 (as-received only), 40.6 (Initial
VPR only), 38, and 48.
73A.2 The vibration test shall consist of vibration for 48 hours at a frequency of 22 cycles per second with a displacement of 6.4 mm (1/4 inch) in a vertical plane. The device shall be mounted as intended during the test.
80InfoDetails (MARKINGS)
80.14 

Additions to existing requirements are underlined

A Type 3 SPD shall be marked ²To Reduce the Risk of Electric Shock – Use only Indoors² or the equivalent. A Type 1 or Type 2 SPD shall be marked ²NEMA Type 1 Enclosure² and may be additionally marked ²Indoor Use Only². The marking shall be either on the inside or outside surface but shall be visible after installation. Lettering shall not be less than 2.4 mm (3/32 inch) high.

Exception No. 1: An SPD that employs other than a Type 1 enclosure as specified in 7.1.1.2 shall comply with the type designation marking requirements, for Enclosure Types, in the Standard for Electrical Equipment, Environmental Considerations, UL 50E.

Exception No. 2: A Type 3 SPD intended for outdoor use shall be marked ²Type 3R Enclosure² or ²Enclosure type 3R², and may be additionally marked ²Rainproof².
80.34 New clause added;

A rack-mounted cord-connected Type 3 SPD for use in a portable equipment shall be marked "For use only in a portable equipment rack."
81InfoDetails (INSTRUCTION MANUAL)
81.1 

Additions to existing requirements are underlined

An instruction manual or the equivalent shall be provided, shall only reference those applications that have been evaluated, and shall include the following:

a) Instructions for installation: Instructions for permanently wired devices shall include the wire gauge sizes, the ampacity of the circuit the device is intended for use on, and the internal wiring methods showing location and routing. The instructions shall state: “The conductors used to connect the SPD to the line or bus and to ground shall not be any longer than necessary and shall avoid unnecessary bends” or similar wording.

b) Instructions for mounting.

c) An explanation of the purpose and function of any indicator (lights, audio indicators, and similar indicators) features employed on the SPD.

d) The interrupting rating of any required external circuit breaker or the short-circuit current level of any required external fuse.

e) The following statement shall be required for SPDs intended for use on ungrounded power systems: ²Caution – Ungrounded power systems are inherently unstable and can produce excessively high line-to-ground voltages during certain fault conditions. During these fault conditions any electrical equipment, including an SPD, may be subjected to voltages which exceed their designed ratings. This information is being provided to the user so that an informed decision can be made before installing any electrical equipment on an ungrounded

power system.²

f) A rack-mounted cord-connected Type 3 SPD shall be provided with instructions for mounting within portable and/or stationary equipment, as applicable.

Exception: A separate instruction manual is not required if the material covered in (a) – (e), is either marked on, or otherwise provided as part of, the equipment.

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.