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Federal Register / Vol. 86, No. 209 / Tuesday, November 2, 2021 / Proposed Rules
expects PPSs to rarely draw more than 2 amps of current at a lowest nameplate output 3.3 volts, similar to USBPD
EPSs with a lowest nameplate output voltage of 5 volts. Similarly, DOE
expects USBPD EPSs with additional optional voltages and currents, which can also have a lowest nameplate output voltage as low as 3.3 volts, to also rarely draw more than 2 amps of current at that output voltage.
In this SNOPR, DOE proposes to modify the proposed definition of a USBPD EPS in order to include USB
PD EPSs with additional optional voltages and currents and PPSs, consistent with the updated industry standard. By modifying the definition of USBPD EPS such that it would include PPS and USBPD EPSs with additional optional voltages and currents, such products would be tested according to the alternate test procedure prescribed for USBPD EPSs in the December 2019
NOPR.
In summary, DOE proposes to define USBPD EPS as an adaptive EPS that utilizes a USB Type-C output port and uses a digital protocol to communicate between the EPS and the end-user product to automatically switch between any output voltage within the range of 3.3 volts to 20 volts. The USB
PD output bus must be capable of delivering 3 amps at the lowest output voltage, and the currents must not exceed any of the following values for the supported voltages: 3 amps at 9
volts; 3 amps at 15 volts; and 5 amps at 20 volts.
DOE also proposes to revise the definition of nameplate output power in order to provide for testing of PPSs and USBPD EPSs with additional optional voltages and currents at 2 amps at the lowest nameplate output voltage, instead of at 5 volts, as was previously specified in the definition of nameplate output power. DOE proposes to revise the definition of nameplate output power to mean the power output of the power supply as specified on the manufacturers label on the power supply housing or, if absent from the housing, as specified in documentation provided by the manufacturer. For an adaptive external power supply with USBPD ports, the nameplate output power is the product of its lowest nameplate output voltage and 2 amps for each USBPD port and as specified on the manufacturers label or documentation at the highest voltage.
The proposed definition would result in PPSs and USBPD EPSs with additional optional voltages and currents being tested according to the same alternate test procedure provided
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for USBPD EPSs in the December 2019
NOPR.
DOE is not aware of any PPSs or USBPD EPSs with additional optional voltages and currents on the market certified as EPSs, and thus DOE does not expect the proposed amendments to require the retesting or recertification of any basic EPS models.
DOE requests comments on the proposed amendments related to PPSs and USBPD EPSs with optional voltages and currents.
E. Test Procedure Costs and Impact In this SNOPR, DOE is proposing to clarify the scope of the EPS test procedure at appendix Z by removing references to direct operation and indirect operation Class A EPSs and providing additional detail regarding the subject EPSs. DOE is also proposing to 1 maintain the placement of certain definitions at 10 CFR 430.2 that DOE
initially proposed to move to appendix Z in the NOPR, 2 provide additional specification for the testing of EPSs that do not ship with an output cord, and 3
align the testing requirements for PPS
with those for USBPD EPSs.
DOE has tentatively determined that the proposed amendments would not be unduly burdensome for manufacturers to conduct. Further details regarding the cost impact of the proposed amendments are presented in the following paragraphs.
1. Scope of Applicability In this SNOPR, DOE proposes to amend the EPS test procedure in appendix Z to provide additional clarity as to those EPSs subject to the test procedure. The proposal would remove reference in the scope section to direct operation EPSs and indirect operation Class A EPSs, as reference to these terms is duplicative with the instruction that the scope of the test procedure are those EPSs subject to standards. DOE also proposes to provide additional detail as to the products subject to the test procedure by noting that devices for which the primary load of the converted voltage within the device is not delivered to a separate end use product are not covered. DOE has tentatively determined that neither of these amendments would change the scope of the EPS test procedure. As such, the proposed amendments to the scoping language would not change 1 the scope of the products subject to the test procedure, 2 the cost to conduct the test procedure, or 3 the cost incurred by manufacturers to re-test any currently covered EPSs. Accordingly, these proposed amendments would not
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impact the test burden for any EPS
manufacturer.
DOE requests comment on its initial determination that the proposed amendments regarding the scope of appendix Z, if finalized, would not cause any EPS manufacturers to incur any additional costs.
2. Testing EPSs That Are Not Supplied With an Output Cord DOE proposes to specify that those EPSs that are not supplied with an output cord would be tested using an output cord recommended by the manufacturer. The current test procedure does not provide explicit instructions on how to test EPSs that are not supplied with an output cord. This proposed amendment would explicitly require EPS manufacturers to conduct the test at the end of an output cord that is connected to the output electrical contact. The addition of an output cord would introduce electrical losses in the test setup and would thus impact the efficiency measurement of an EPS. DOE
acknowledges that the proposals related to the testing of EPSs that are not supplied with an output cord could impact the measured energy use of certain basic modelsspecifically, those models that were tested without an output cord or with an output cord different from what would be required by the proposed amendment. However, this proposal, if adopted, would not be required until such time as DOE were to amend the energy conservation standards for EPSs. Moreover, were this proposal adopted, it would not result in an increase in test burden as compared to the current test procedure, as it would not require any additional testing steps.
DOE requests comment on its initial determination that the proposed amendment to test EPSs shipped without an output cord with a manufacturer recommended cord, if finalized, would not increase the test burden as compared to the current test procedure once required.
3. USBPD With Additional Optional Voltages and Currents and Programmable Power Supplies DOE proposes to amend the definition of a USBPD EPS, as proposed in the December 2019 NOPR, in order to include USBPD EPSs with additional optional voltages and currents and PPSs. DOE is not aware of any USBPD
EPSs with additional optional voltages and currents or PPSs that are currently certified in DOEs Compliance Certification Database CCD. Further, DOE has not received any waiver petitions under 10 CFR 430.27 for USB

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