MSHA - Code of Federal Regulations - 30 CFR 7.303
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MSHA - Title 30 CFR
30 CFR § 7.303
Application requirements.

(a) An application for approval of a motor assembly shall include a composite drawing or drawings with the following information:

(1) Model (type), frame size, and rating of the motor assembly.

(2) Overall dimensions of the motor assembly, including conduit box if applicable, and internal free volume.

(3) Material and quantity for each of the component parts that form the explosion-proof enclosure or enclosures.

(4) All dimensions (including tolerances) and specifications required to ascertain compliance with the requirements of §7.304 of this part.

(b) All drawings shall be titled, dated, numbered, and include the latest revision.

[57 FR 61193, Dec. 23, 1992]