---
kind: "section"
citation: "30 C.F.R. § 18.94"
title: "30"
number: "18.94"
heading: "Application for field approval; contents of application."
url: "https://uscodex.org/cfr/30/18.94"
---

# §18.94. Application for field approval; contents of application.

- (a) Each application for field approval shall, except as provided in [§ 18.93(b)](/cfr/30/18.93.md?p=b), include the following information with respect to the electrically operated machine for which field approval is sought:
  - (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:
    - (i) Overcurrent protection of motors;
    - (ii) All wiring between components, including mechanical protection such as hose conduit and clamps;
    - (iii) Portable trailing cable for use with the machine, including the type, length, diameter, and number and size of conductors;
    - (iv) Insulated strain clamp for machine end of portable trailing cable;
    - (v) **Short-circuit protection to be provided at outby end of portable trailing cable.**

## Notes

### Amendments

[33 FR 4660, Mar. 19, 1968, as amended at 57 FR 61223, Dec. 23, 1992]

### Source

Source: 36 FR 7007, Apr. 13, 1971, unless otherwise noted.

### Authority

Authority: 30 U.S.C. 957, 961.

### Source

Source: 33 FR 4660, Mar. 19, 1968, unless otherwise noted.

### Amendments

[33 FR 4660, Mar. 19, 1968, as amended at 57 FR 61223, Dec. 23, 1992]