Code of Federal Regulations > Title 40 > Chapter I > Part 53 > Subpart B > Appendix - Table B-4 to Subpart B of Part 53—Line Voltage and Room Temperature Test Conditions

Regulations last checked for updates: Feb 22, 2025

Title 40 - Protection of Environment last revised: Nov 22, 2025

Appendix - Table B-4 to Subpart B of Part 53—Line Voltage and Room Temperature Test Conditions

Test day	Line voltage, ¹ rms	Room temperature, ² °C	Comments
0	115	25	Initial set-up and adjustments.
1	125	20
2	105	20
3	125	30	Adjustments and/or periodic maintenance permitted at end of tests.
4	105	30
5	125	20
6	105	20	Adjustments and/or periodic maintenance permitted at end of tests.
7	125	30	Examine test results to ascertain if further testing is required.
8	105	30
9	125	20	Adjustments and/or periodic maintenance permitted at end of tests.
10	105	20
11	125	30
12	105	30	Adjustments and/or periodic maintenance permitted at end of tests.
13	125	20
14	105	20
15	125	30

¹ Voltage specified shall be controlled to ±1 volt.

² Temperatures shall be controlled to ±1 °C.

authority: Sec. 301(a) of the Clean Air Act (42 U.S.C. sec. 1857g(a)), as amended by sec. 15(c)(2) of Pub. L. 91-604, 84 Stat. 1713, unless otherwise noted

source: 40 FR 7049, Feb. 18, 1975, unless otherwise noted.