(a) A certificate of approval will be accompanied by a photograph of
a design for an approval plate, bearing the emblem of the Mine Safety and
Health Administration, the name of the applicant, the name of the unit, the
approval number or space for the approval number (or numbers if
permissibility of electrical parts is involved), spaces for the type and the
serial numbers of the unit, conditions of approval, and identifying numbers
of the dust-collector parts. When deemed necessary by MSHA, an appropriate
statement shall be added, giving the precautions to be observed in
maintaining the unit in an approved condition.
(b) An approval plate for a unit designed for use in a nongassy coal
mine shall state that any electrical parts are not certified for use in a
gassy coal mine. (See §33.38(c).)
(c) The applicant shall reproduce the design either as a separate
plate or by stamping or molding it in some suitable place on each unit to
which it relates. The size, type, and method of attaching and location of an
approval plate are subject to the approval of MSHA. The method of affixing
the plate shall not impair the dust-collection or explosion-proof features
of the unit.
(d) The approval plate identifies the unit, to which it is attached,
as permissible, and is the applicant's guarantee that the unit complies with
the requirements of this part. Without an approval plate, no unit has the
status of "permissible" under the provisions of this part.
(e) Use of the approval plate obligates the applicant to whom the
certificate of approval was granted to maintain the quality of each unit
bearing it and guarantees that it is manufactured and assembled according to
the drawings and specifications upon which a certificate of approval was
based. Use of the approval plate is not authorized except on units that
conform strictly with the drawings and specifications upon which the
certificate of approval was based.
[Sched. 25B, 25 FR 6473, July 9, 1960, as amended at 43 FR 12317, Mar. 24,
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