Shaft conveyance signals

(1) A signalling system acceptable to the inspector shall be installed to permit the person in charge of the shaft conveyance (cage tender) and the hoist operator to exchange control signals. 149 (2) The signalling system shall be supplied with power at a potential not exceeding 150 volts from a transformer that does not supply any other equipment. Signalling system power. (3) The signal system shall enable clear, audible signals to be given that are separate and distinct for each compartment so arranged that the hoist operator can return a signal to the conveyance tender and be installed at every working level, landing deck and any other necessary locations. Only tenders to give signals. (4) Only the conveyance tenders shall give any signal other than a danger signal. Hoist only moved on (5) A hoist shall not be moved unless the signal given by the conveyance tender has been returned by the hoistman and at least 4 seconds have elapsed. If more than 30 seconds have elapsed, a complete new set of signals shall be given and acknowledged. (6) A system shall be installed and maintained for voice communication between the landing stations, the shaft collar, and the hoistroom. Voice communication system required.