NAC512.164. Code of bell signals for hoisting.

     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

    

     2. One copy of this code of bell signals must be posted on the gallows-frame, one before the engineer and one at each station. Other bell signals which are not in conflict with this code may be used for local conditions, but a table showing such other signals must be posted in connection with this code.

     [Inspector of Mines, Part 1 No. 19 subsecs. a-c, e & g, eff. 8-13-75]—(NAC A by Div. of Mine Inspection, 8-26-83)