Interpretation ID: nht71-5.61

DATE: 09/15/71

FROM: AUTHOR UNAVAILABLE; C. A. Baker for E. T. Driver; NHTSA

TO: E. R. Buske Mfg. Co., Inc.

TITLE: FMVSS INTERPRETATION

TEXT: Your letter of September 3, 1971, to the Bureau of Motor Carrier Safety concerning the mounting of lamps on a body backplate has been referred to this Office for consideration and reply.

Federal Motor Vehicle Safety Standard No. 108 requires that lamps meet the applicable SAE Standards (including the photometric specifications) when tested as mounted on the vehicle. (See SAE J575c, Paragraph J.) The maximum angle from a line perpendicular to the longitudinal centerline of the vehicle that a lamp can be mounted and meet the applicable requirements depends upon the design and configuration of the lamp. We therefore recommend that you contact the manufacturer of your lamps for this maximum angle information.