Federal Register - November 2, 2021
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Source: Federal Register
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Federal Register / Vol. 86, No. 209 / Tuesday, November 2, 2021 / Proposed Rules
jspears on DSK121TN23PROD with PROPOSALS1
B. Location of EPS Definitions In the December 2019 NOPR, DOE
proposed moving all EPS-related definitions that are currently defined in 10 CFR 430.2 to the EPS test procedure at appendix Z. 84 FR 67106, 67115
December 6, 2019. Specifically, DOE
proposed to move the definitions of adaptive external power supply, basic-voltage external power supply, direct operation external power supply, indirect operation external power supply, and low-voltage external power supply from 10 CFR
430.2 to appendix Z. DOE did not propose to amend these definitions. Id.
However, in this SNOPR, DOE is no longer proposing such a relocation because, except for the term adaptive external power supply, these terms are not used elsewhere in the test procedure. Because the terms basicvoltage external power supply, direct operation external power supply, indirect operation external power supply, and low-voltage external power supply are not used in the test procedure, those terms are more appropriately located in the general definitions section at 10 CFR 430.2. The term adaptive external power supply is specific to the test procedure, and, for ease of reference, DOE is proposing to move that definition to appendix Z.
In the December 2019 NOPR, DOE
also proposed to include the definition of Class A external power supply in appendix Z while also retaining it at 10
CFR 430.2, where it currently exists. 84
FR 67106, 67115 December 6, 2019.
However, in this SNOPR, DOE proposes to retain the definition of a Class A
external power supply only at 10 CFR
430.2 and not include it in the EPS test procedure at appendix Z because this term is not used in the EPS test procedure itself.
DOE requests feedback on maintaining the definitions of Class A
external power supply, basic-voltage external power supply, direct operation external power supply, indirect operation external power supply, and low-voltage external power supply in their current location at 10 CFR 430.2. DOE also requests comment on the proposed relocation of the definition of adaptive external power supply to appendix Z.
C. Testing EPSs That Are Not Supplied With an Output Cord The current EPS test procedure requires EPSs to be tested with the DC
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output cord supplied by the manufacturer. appendix Z, sec.
4aiA. In a final rule published August 25, 2015 August 2015 final rule, which established the current requirements regarding testing with the power cord, DOE stated that allowing an EPS to be tested without the power cord would ignore the losses associated with the cord and allow for an EPS that is less efficient than the efficiency standards intended. 80 FR 51424, 51429. Accordingly, DOE specified that EPSs must be tested with the output cord supplied by the manufacturer. Id.
DOE received multiple stakeholder inquiries regarding how to test EPSs that are not shipped with a DC output cord.
In response to these inquiries, in the December 2019 NOPR, DOE proposed to amend the test procedure to explicitly state that if a wire or cord is not supplied by the manufacturer, then the EPS shall be tested at the output electrical contact that can be connected to a physical wire. 84 FR 67106, 67124
December 6, 2019. DOE did not receive any comments on this amendment.
Since the analysis conducted in support of the December 2019 NOPR, DOE has observed an increasing number of EPSs that are not packaged or supplied with an accompanying DC
output cord.8 9 10 For example, as USB
EPSs become more ubiquitous, it is likely that many consumers already own a USB cable, thereby reducing the demand for EPSs to be supplied with a USB output cord. The current test procedure does not provide explicit instructions to address this scenario, and DOE recognizes that the absence of these instructions may result in manufacturers testing such an EPS
without the output cord, when in actual use they are likely used in conjunction with a cord already owned by the consumer. Testing an EPS without an output cord would ignore the losses that are associated with using the EPS with the cord in the real-world and, therefore, the rated efficiency of such an EPS would not be representative of realworld use i.e., the rated efficiency of an EPS tested without an output cord would be higher than that seen in realworld use. Additionally, the type of cord used to test such an EPS would also impact the measured efficiency because different cords may have different cord losses, thereby impacting the repeatability and reproducibility of the test procedure.
As such, in order to improve the representativeness and repeatability and reproducibility of the EPS test procedure, DOE is proposing to revise the procedure to explicitly state that if an EPS is not supplied with an output cord, then the EPS shall be tested with an output cord that is recommended for use by the manufacturer. If an EPS
contains multiple output busses, each output bus would be tested with an output cord that is recommended for use by the manufacturer. Specifically, proposed Section 4g1 of appendix Z
would require testing each output port of an external power supply at the end of the wire or cord that connects to an end-use product, regardless of whether the end of the wire or cord is integrated into an end-use product or plugs into and out of an end-use product. If a separate wire or cord is provided by the manufacturer to connect the external power supply to an end-use product, this wire or cord would be used and testing would be performed at the end of the cord that connects to an end-use product. If a wire or cord is not supplied by the manufacturer, the external power supply would be tested with an output cord recommended for use by the manufacturer.
As indicated in the August 2015 final rule, the choice of power cord when testing may impact the measured energy use of an EPS. 80 FR 51424, 51429
August 25, 2015. It is uncertain the extent to which this proposed amendment would impact the measured energy use of EPSs that are currently certified. If adopted, testing to this provision would not be required until such time as compliance is required with amended energy conservation standards, should such standards be adopted.
DOE requests comment on its proposed amendments for EPSs that are not supplied with output cords; and specifically, DOE requests comment on whether the test procedure should specify testing with a DC output cord recommended for use by manufacturers, or whether DOE should specify electrical specifications i.e., cord length, gauge, material for the type of cord. For example, DOE could prescribe a table, as shown below, that contains electrical specifications of DC output cords for various ranges of nameplate output currents at the 100% loading condition.
9 ORICO DCAP5U 5-Port USB Wall Charger adapter sold on newegg.com; www.regulations.gov/
document/EERE-2019-BT-TP-0012-0014.
10 Sony Camera Charger UB10 USB to AC Power Adapter sold on newegg.com, www.regulations.gov/
document/EERE-2019-BT-TP-0012-0016.
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