243. A hoist shall have a depth indicator continuously showing the hoistman the position of the conveyance and the counterweight in the shaft and the headframe. In case the electrical supply breaks down, that indicator shall show the position of the conveyance and the counterweight for at least 1 hour and return to the value corresponding to the return current.
O.C. 213-93, s. 243; O.C. 465-2002, s. 18.