sec.233Coal cutter, continuous miner, tunnel boring and road heading machine

### sec.233 Coal cutter, continuous miner, tunnel boring and road heading machine A coal cutter, continuous miner, tunnel boring or road heading machine must be fitted with at least 1 automatic methane detector to detect the methane concentration near the cutters. If the machine is fitted with only 1 automatic methane detector, the detector must automatically— activate a visible alarm to warn the operator when the concentration exceeds 1%; and trip the electricity supply to the machine when the concentration exceeds 2%. If the machine is fitted with more than 1 automatic methane detector— a detector fitted to detect the methane concentration near the cutters 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 2%; and a detector fitted to detect the general body concentration of methane around the machine must automatically— activate a visible alarm to warn the operator when the concentration exceeds 1%; and trip the electricity supply to the machine when the concentration exceeds 2%. (sec.233-ssec.1) A coal cutter, continuous miner, tunnel boring or road heading machine must be fitted with at least 1 automatic methane detector to detect the methane concentration near the cutters. (sec.233-ssec.2) If the machine is fitted with only 1 automatic methane detector, the detector must automatically— activate a visible alarm to warn the operator when the concentration exceeds 1%; and trip the electricity supply to the machine when the concentration exceeds 2%. (sec.233-ssec.3) If the machine is fitted with more than 1 automatic methane detector— a detector fitted to detect the methane concentration near the cutters 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 2%; and a detector fitted to detect the general body concentration of methane around the machine must automatically— activate a visible alarm to warn the operator when the concentration exceeds 1%; and trip the electricity supply to 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 the machine when the concentration exceeds 2%. - (a) a detector fitted to detect the methane concentration near the cutters must automatically— (i) activate a visible alarm to warn the operator when the concentration exceeds 1%; and (ii) trip the electricity supply to the cutters when the concentration exceeds 2%; and - (i) activate a visible alarm to warn the operator when the concentration exceeds 1%; and - (ii) trip the electricity supply to the cutters when the concentration exceeds 2%; and - (b) a detector fitted to detect the general body concentration of methane around the machine must automatically— (i) activate a visible alarm to warn the operator when the concentration exceeds 1%; and (ii) trip the electricity supply to the machine when the concentration exceeds 2%. - (i) activate a visible alarm to warn the operator when the concentration exceeds 1%; and - (ii) trip the electricity supply to the machine when the concentration exceeds 2%. - (i) activate a visible alarm to warn the operator when the concentration exceeds 1%; and - (ii) trip the electricity supply to the cutters when the concentration exceeds 2%; and - (i) activate a visible alarm to warn the operator when the concentration exceeds 1%; and - (ii) trip the electricity supply to the machine when the concentration exceeds 2%.