sec.234Longwall shearer

### sec.234 Longwall shearer A longwall shearer must be fitted with at least 1 automatic methane detector to detect the general body concentration of methane around the machine. The detector must automatically— activate a visible alarm to warn the operator when the concentration exceeds 1%; and trip the electricity supply to— the cutters when the concentration exceeds 1.25%; and the machine when the concentration exceeds 2%. (sec.234-ssec.1) A longwall shearer must be fitted with at least 1 automatic methane detector to detect the general body concentration of methane around the machine. (sec.234-ssec.2) The detector must automatically— activate a visible alarm to warn the operator when the concentration exceeds 1%; and trip the electricity supply to— the cutters when the concentration exceeds 1.25%; and the machine when the concentration exceeds 2%. - (a) activate a visible alarm to warn the operator when the concentration exceeds 1%; and - (b) trip the electricity supply to— (i) the cutters when the concentration exceeds 1.25%; and (ii) the machine when the concentration exceeds 2%. - (i) the cutters when the concentration exceeds 1.25%; and - (ii) the machine when the concentration exceeds 2%. - (i) the cutters when the concentration exceeds 1.25%; and - (ii) the machine when the concentration exceeds 2%.