226. (1) No hoist that is electrically powered shall be used unless it has a safety circuit that, (a)  is fail safe; (b)  when interrupted, operates to, (i)  set the brakes, (ii)  remove power from the hoist motor or motors, and (iii)  stop the mine hoist when in motion.  R.R.O. 1990, Reg. 854, s. 226 (1). (2) The safety circuit of a hoist shall be interrupted when, (a)  there is a failure of a power supply to the hoist electrical system which may affect safe operation; (b)  there is an overload on the hoist motors of a magnitude and duration exceeding normal; (c)  there is a short circuit in the hoist electrical system; and (d)  a prescribed safety device has operated.  R.R.O. 1990, Reg. 854, s. 226 (2). (3) A switch to interrupt the safety circuit of a hoist shall be installed and the switch shall be, (a)  manually operable; (b)  located within easy reach of the hoist operator when at the controls; (c)  readily recognizable; and (d)  readily operable.  R.R.O. 1990, Reg. 854, s. 226 (3). (4) A track limit device shall be installed in each shaft compartment that will be operated directly by the shaft conveyance or counterweight to interrupt the safety circuit of a hoist in the case of an overwound shaft conveyance or counterweight.  R.R.O. 1990, Reg. 854, s. 226 (4). (5) Devices shall be installed to protect a shaft conveyance or counterweight against, (a)  an overwind; (b)  an underwind, except during shaft sinking; (c)  approaching the limits of travel at an excessive speed; and (d)  operating or being operated at an overspeed in excess of that for which the hoisting plant was designed and intended.  R.R.O. 1990, Reg. 854, s. 226 (5). (6) The devices required by subsection (5) shall, (a)  operate to interrupt the safety circuit when activated; (b)  be driven directly by the drum; (c)  be protected for loss of motion; (d)  prevent the paying out of excess rope during shaft sinking; and (e)  be set to stop the hoist before a shaft conveyance, counterweight and their attachments make contact with a fixed part of a mine shaft or headframe.  R.R.O. 1990, Reg. 854, s. 226 (6). (7) Devices shall be installed for a friction hoist that are set to interrupt the safety circuit where, (a)  there is abnormal slip between the hoist drum and the hoist ropes; (b)  there is abnormal wear of the rope treads or the tread wear limit has been reached; (c)  a shaft conveyance and counterweight approaches the collar of a mine shaft at excessive speed; or (d)  a violent swing or large rise in the loop of a balance rope occurs.  R.R.O. 1990, Reg. 854, s. 226 (7). (8) The devices required for the purposes of clause (7) (c) shall be installed in the mine shaft.  R.R.O. 1990, Reg. 854, s. 226 (8). (9) On a friction hoist, a device shall be installed that synchronizes the position of the shaft conveyance with safety devices driven from the drum.  R.R.O. 1990, Reg. 854, s. 226 (9). (10) A hoist that is electrically powered shall, (a)  be equipped with a device that, (i)  measures the load on the hoist drive motor at all times, and (ii)  is always within plain view of the hoist operator; (b)  except when the slowdown control at the limits of travel is automatic, have a device to warn the operator, audibly, that the hoist is approaching the limit where a reduction in speed is necessary for safe manual braking; (c)  have a speed indicator if the normal speed exceeds 2.5 metres per second; (d)  have a device from which a voltage signal that is proportioned to the speed of the hoist can be obtained; (e)  have a backout device as prescribed in subsection (11) by which a shaft conveyance or counterweight can be removed from an overwound or underwound position; (f)  if equipped with an underwind by-pass device, have such device, (i)  manually operable only, and (ii)  restrict the hoist operation to slow speed; (g)  have overwind by-pass devices that, (i)  are manually operable only, (ii)  when in use restrict hoist operation to slow speed, and (iii)  allow hoist travel beyond the first device providing overwind protection; (h)  have a master controller that has a neutral or brake reset position; (i)  have any brake operating levers arranged so that upon an interruption of the safety circuit the power to the hoist cannot be restored until the levers are in the brake applied position; (j)  have accurate and sensitive safety controllers; and (k)  have each safety-related device capable of being effective under the environmental conditions in which it is installed. R.R.O. 1990, Reg. 854, s. 226 (10); O. Reg. 69/23, s. 29. (11) A backout device shall, (a)  be manually operable only; and (b)  prevent the brake or brakes from being released until sufficient torque has been developed to ensure movement in the correct direction.  R.R.O. 1990, Reg. 854, s. 226 (11). (12) The adjustment of a protective device shall be altered only by a competent person authorized to do so.  R.R.O. 1990, Reg. 854, s. 226 (12).