15.2 If the timer is in series with the supply cord, and is separable from the lamp, the interconnection shall be of a nonstandard configuration to preclude bypassing of the timer. 15.3 A sunlamp timer shall have a maximum time setting equal to the maximum recommended exposure time indicated in the instructions accompanying the sunlamp. In addition, the timer shall have a sufficient number of time settings that correspond with the time intervals for different exposure positions and expected results as indicated by the marking on the sunlamp. See paragraph 32.12. 15.4 A sunlamp timer shall not have a permanent "on" position. No timer interval shall have an error greater than 10 percent of the maximum timer interval of the product. 15.5 The timer may be equipped with an audible or visual signal to warn of pending shutdown. 15.6 A sunlamp timer shall provide the user with a means to manually terminate radiation emission, unless a separate control is provided for this purpose. Disconnecting the supply cord or removal of the lamp from its holder is not acceptable. 16. Protective Eyewear 16.1 Each sunlamp shall be provided with at least one set of protective eyewear per person recommended in the instructions to be exposed simultaneously to the sunlamp. 16.2 The protective eyewear shall be close fitting and shall protect the eye area from both the front and the sides. 16.3 The spectral transmittance of protective eyewear shall not exceed a value of 0.001 over the wavelength range greater than 200 nanometers through 320 nanometers and a value of 0.01 over the wavelength range greater than 320 nm through 400 nm, and shall be sufficient over the wavelengths greater than 400 nm to enable the user to see clearly enough to read the markings and reset the timer. 17. Spacings 17.1 Except as noted in paragraph 17.2, the spacing between uninsulated live parts of opposite polarity, and between an uninsulated live part and a dead-metal part, shall not be less than the value indicated in Table 17.1. If an uninsulated live part is not rigidly supported, or if a movable dead-metal part is in proximity to an uninsulated live part, the construction shall be such that the required spacing will be maintained under all operating conditions. 
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