Nevada Administrative Code › Chapter 512 - Inspection and Safety of Mines › HEALTH AND SAFETY STANDARDS › Section 512.164 - Code of bell signals for hoisting

Current through June 11, 2024
1. At all mines where hoisting apparatus is used in the State of Nevada, the following code of bell signals must be adopted and used:
(a) COMMAND SIGNALS
Stop...........................................................................................................
.................. 1 Bell
Lower Conveyance....................................................................................
................ 2 Bells
Raise Conveyance......................................................................................
................ 3 Bells
Hoist Persons.............................................................................................
............. 3-1 Bells
Lower Persons...........................................................................................
............. 3-2 Bells
Hoist Slowly with Caution...........................................................................
......... 3-3-1 Bells
Lower Slowly with Caution.........................................................................
......... 3-3-2 Bells
Hoist Muck or Materials Only....................................................................
......... 1-2-1 Bells
Release Conveyance..................................................................................
......... 2-1-2 Bells
Repeat.......................................................................................................
......... 2-2-2 Bells
The conveyance must not be moved without a command signal. When persons are to be hoisted or lowered, they must enter the conveyance and close the door and then give the signal for the desired level, followed by "Hoist Persons" (3-1 Bells) or "Lower Persons" (3-2 Bells). Additional signals are:
For blasting, 3-2-1 Bells, which the hoisting engineer shall acknowledge by raising and lowering the conveyance slightly.
For an emergency, 9 Bells, followed by ringing the mine level signal for the level where the emergency exists.
(b) MINE LEVEL SIGNALS
Shaft Collar.......................................................................................................
...... 1-2 Bells
First Level.........................................................................................................
...... 2-1 Bells
Second Level....................................................................................................
...... 2-2 Bells
Third Level.......................................................................................................
...... 2-3 Bells
Fourth Level.....................................................................................................
...... 2-4 Bells
Fifth Level.........................................................................................................
...... 2-5 Bells
Sixth Level........................................................................................................
...... 4-1 Bells
Seventh Level...................................................................................................
...... 4-2 Bells
Eighth Level......................................................................................................
...... 4-3 Bells
Ninth Level.......................................................................................................
...... 4-4 Bells
Tenth Level.......................................................................................................
...... 4-5 Bells