SUMMARY OF REQUIREMENTS

for

UL 2158, 4th Edition, dated December 18, 2015

Electric Clothes Dryers

This document is derived from the following Standard Development Organization (SDO) bulletin(s) or other documentation publicly available to UL subscribers:

Standard Development Organization (SDO) / Document Type / Document Designation / Date
UL/CSA / Standard and Bulletins / UL 2158/CSA 112 / UL 2158, 4th Edition
UL 2158 Bulletin dated August 28, 2015
Primary motivator for the Standards revision / New Technology, harmonization, general updates, clarifications, and corrections.
CCNs Impacted / KMEX (including -2, 3, 7, 8, 9), OOWK* (including -7), ZCTT* (including -2, 3, 7, 8, 9), and ZCTX*
* - indicates combination clothes washer/dryers may be impacted.

The following is a summary of the revised/new certification requirements.

Action is Required for currently certified products to comply with the new/revised certification requirements, as well as for previous Action Not Required certification requirements, as listed in this document.

Clause / Summary of requirements / Action /
Revise Clauses 14.1, 14.3, 29.3.1, 29.3.6, and Table 13 / DC Dielectric Test Potential – providing the option to conduct the Electric Strength using an AC or DC Dielectric Test Potential – based on CRD / Revised requirements -
No impact
Several new and revised clauses / Controls - revisions to the control requirements
·  Clause 21.12 has been revised to only include switch requirements.
·  New Clause 21.13 now incorporates the applicable controls requirements that were in old Clauses 24.12 and 24.13. The control requirements have been revised to include the relevant UL 60730 and software requirements. As a part of this new Clause 21.13, various control functions are specifically identified as operating or protective control functions and the UL 60730 parameters to be applied to each are outlined. In addition, definitions for operating and protective controls are also proposed to align with similar definitions included in UL 60730-1. Note clause 21.13.3.5 which includes the following requirements: “The secondary function control (Clause 17.6.2), door interlock (Clauses 17.1.2 and 17.7.1), door lock (Clauses 17.7.1), electronic braking means (Clause 17.7.1(b)), motor overload protection (Clause 21.7), temperature-limiting devices, combination temperature-regulating and -limiting devices, and any control relied upon for compliance with the abnormal operation testing of Clauses 16, 28.14, or 28.15 are considered and shall be tested and evaluated as protective controls.”
·  Revisions to Clauses 3.1.11, 26.1.1, 26.1.2, 26.1.3 and 26.2.4 and the addition of 3.1.11 are intended to clarify those requirements not applicable for low-voltage circuits.
·  The definitions for temperature-regulating thermostat, temperature-limiting thermostat, and combined temperature-regulating thermostat in Clauses 3.1.32 through 3.1.34 have been revised to allow for devices other than thermostats and align with the terminology within the body of the standard. / New and Revised requirements –
Impact
New Clause 19.7.4 and Table 14 / Heat Pump Dryer – based on CRD / New requirements -
No impact
New Clause 21.13.4.3 / Temperature Limiting Control - Clothes Dryer Operation on High Limit Control / New requirements –
Impact
New Clause 12 / Clothes Dryer Temperatures / New requirements –
Impact
Added Note to Clause 28.3 / Alternative End Product Flame Tests for HB Rating – based on CRD / Revised requirements -
No impact
Revised Clause 7.9 / Accessibility Via the Opening Between the Bottom of the Appliance and the Floor / New requirements -
No impact
New Clauses 16.4.3 – 16.4.5 / Drum Rotation / New requirements –
Action not required
Impact
New Clause 6.2.2.4 – Item 14 / Dryer Instructions / New requirements –
Impact
New Clauses 21.3.4 and 21.3.5 / Capacitors / Revised requirements -
No impact
New Clauses 16.8 and 28.4.2 - 28.4.7 / Revision to Polymeric Materials Requirements and Addition of Nichrome Wire Test / New requirements –
Impact
Revised Clause 19.1.2 / Current Carrying Parts / New requirements –
No impact
New Supplement SB / Alternate Path for Electronic Controls – based on CRD / New requirements – No impact
Revised Table 2 (new items 15 and 15A) / Class F Insulation System Limits for a Motor Having a Frame Diameter of More Than 178 mm – based on CRD / Revised requirements -
No impact
New Supplement SC / Plumbing Requirements for Home Laundry Equipment (based on existing plumbing requirements) / Revised requirements -
No impact

The following are the previous Action Not Required certification requirements related to the Third Edition of UL 2158.

Adding 19.3.2
(Clause 16.3.2 in the 4th edition of UL 2158) / Addition of a flood test to simulate failure of water valve in the open position / New requirement - action not required
Impact /
Adding Clause 24.13.9
(Clause 21.13.4.2 in the 4th edition of UL 2158) / Addition of requirements for thermistor-type devices used as temperature controls / New requirement - action not required
Impact /
Adding Clauses 7.2.3.9, 7.2.3.10, 7.2.5.3 / Addition of requirements for installation and user maintenance instructions for ungrounded parts and installation instructions for installation on a concrete floor / New requirement - action not required
Impact /
Adding Clause 27.2.5
(Clause 24.2.5 in the 4th edition of UL 2158) / Addition of neutral-ground link requirements / New requirement - action not required
Impact /