Section 73A(7)(ii) in The M.P. Factories Rules, 1962
(ii)failure of any of the ventilating or circulating fans will automatically stop any conveyor as referred to in clause (i) as may be provided, as well as stop the fuel supply by closing the 'shut off valve and shut off' the ignition in the case of gas or oil fired ovens, and in the case of electrically heated ovens switch off the electrical supply to the heaters;