30 CFR § 18.94 Application for field approval; contents of application.
(a) Each application for field approval shall, except as provided in
§18.93(b), include the following information with
respect to the electrically operated machine for which field approval is
(1) The trade name and the certification number or other
means of identifying any explosion-proof compartment or intrinsically-safe
component installed on the machine for which a prior approval or
certification has been issued under the provisions of Bureau of Mines
Schedules 2D, 2E, 2F, or 2G.
(2) The trade name and the flame-resistance acceptance or
approval number of any cable, cord, hose, or conveyor belt installed on the
machine for which prior acceptance or approval by MSHA has been issued.
(b) Each application for field approval shall be accompanied by:
(1) If the machine is constructed or assembled entirely
from components which have been certified or removed from machines approved
under Bureau of Mines Schedule 2D, 2E, 2F, or 2G, photographs or a single
layout drawing which clearly depicts and identifies each of the permissible
components and its location on the machine.
(2) If the machine contains one or more components
required to be permissible which has not been approved or certified under
Bureau of Mines Schedule 2D, 2E, 2F, or 2G, a single layout drawing which
clearly identifies all of the components from which it was assembled.
(3) All applications shall include specifications for:
(b)(3)(i) Overcurrent protection of motors;
(b)(3)(ii) All wiring between components, including
mechanical protection such as hose conduit and clamps;
(b)(3)(iii) Portable trailing cable for use with the machine,
including the type, length, diameter, and number and size of conductors;
(b)(3)(iv) Insulated strain clamp for machine end of portable
(b)(3)(v) Short-circuit protection to be provided at outby
end of portable trailing cable.
U.S. Department of Labor | Mine Safety and Health Administration (MSHA) | 1100 Wilson Boulevard, 21st Floor | Arlington, VA 22209-3939 www.msha.gov | Telephone: (202) 693-9400 | Fax-on-demand: (202) 693-9401