10 CFR § 429.49 - Traffic signal modules and pedestrian modules.

§ 429.49 Traffic signal modules and pedestrian modules.

(a) Sampling plan for selection of units for testing.

(1) The requirements of § 429.11 are applicable to traffic signal modules and pedestrian modules; and

(2) For each basic model of traffic signal module or pedestrian module selected for testing, a sample of sufficient size shall be randomly selected and tested to ensure that -

(i) Any represented value of estimated maximum and nominal wattage or other measure of energy consumption of a basic model for which consumers would favor lower values shall be greater than or equal to the higher of:

(A) The mean of the sample, where:

x = 1 n i = 1 n x i and, x is the sample mean; n is the number of samples; and x i is the i th sample;

Or,

(B) The upper 95 percent confidence limit (UCL) of the true mean divided by 1.10, where:

U C L = x + t . 95 ( s n ) And x is the sample mean; s is the sample standard deviation; n is the number of samples; and t 0.95 is the t statistic for a 95% two-tailed confidence interval with n- 1 degrees of freedom (from Appendix A).

and

(ii) Any represented value of the energy efficiency or other measure of energy consumption of a basic model for which consumers would favor higher values shall be less than or equal to the lower of:

(A) The mean of the sample, where:

x = 1 n i = 1 n x i and, x is the sample mean; n is the number of samples; and x i is the i th sample;

Or,

(B) The lower 95 percent confidence limit (LCL) of the true mean divided by 0.90, where:

L C L = x - t . 95 ( s n ) And x is the sample mean; s is the sample standard deviation; n is the number of samples; and t 0.95 is the t statistic for a 95% two-tailed confidence interval with n- 1 degrees of freedom (from Appendix A).

(b) Certification reports.

(1) The requirements of § 429.12 are applicable to traffic signal modules and pedestrian modules; and

(2) Pursuant to § 429.12(b)(13), a certification report shall include the following public product-specific information: The maximum wattage at 74 degrees Celsius (°C) in watts (W), the nominal wattage at 25 degrees Celsius (°C) in watts (W), and the signal type.

[76 FR 12451, Mar. 7, 2011; 76 FR 24778, May 2, 2011]

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