Program Policy Manual - VOLUME V - Mine Safety and Health ...

MSHA PROGRAM POLICY MANAUL VOLUME V
Brake fluid used in manually-operated automotive-type braking
systems is not considered to be hydraulic fluid within the
meaning of paragraph (b) of this section.
It is important that equipment, to be considered attended, be in
line of sight of a miner at least once during a 30-minute period.
If the normal duties of a miner require that the miner face in
one direction opposite to a machine, for example at a belt
discharge point, it can be assumed that the miner will turn his
head to the machine behind him often enough to comply with the
30-minute requirement of paragraph (c). However, if a machine is
closer to a miner than 500 feet but is around a corner, it would
be classed unattended unless the normal duties of the miner
require him to pass by the obstructing corner during every 30minute
interval, and he or she has reason to look around the
corner when passing.
Paragraph (d) of this Section requires that machines normally
used at the face be inspected (for fire), and the input powerline
deenergized when the miner leaves the area for more than 30
minutes. Deenergization means disconnecting the power cable, or
equivalent, at the power center.
75.1107-3 Fire-Suppression Devices; Approved Components;
Installation Requirements
The purpose of this section is to ensure that the components of
the fire-suppression device are of the type approved by
Underwriters' Laboratories, Inc., or Factory Mutual Research
Corporation ("UL" or the initials "FM" in a diamond-shaped box
will be on the components or device). Generally, Underwriters'
Laboratory, Inc., approves the entire system, whereas Factory
Mutual Research Corporation approves components. Some hardware
components on a fire-suppression device, such as nuts, bolts,
clamps, brackets, and the like, need not bear UL or FM approval,
but sound engineering judgment should be exercised in overall
approval of such a device. Components of a type not listed as
approved, or not installed in accordance with the recommendations
of a nationally recognized testing laboratory (UL or FM), may be
accepted if such components are of a type and installed in a
manner approved by the Secretary, as determined by the district
manager. However, components of fire-suppression devices on
attended and unattended equipment shall be listed or approved by
UL or FM where these companies have listed or approved the type
of components used in a system.
The Approval and Certification Center has conducted tests on
American Biltrite Rubber Company's Cover Compound No. 22107,
accepted it for listing, and authorized the marking "USBM-2G-
October 2003 (Release V-34) 114