Nmac

(g) All exterior openings shall be sealed to resist the entrance of rodents. (3) Interior gas piping. Each gas-fired appliance must have a listed shut-off valve located within three (3) feet of the appliance and located in the same room as the gas appliance. Appliance connectors shall not exceed three (3) feet in length, except for range connectors, which shall not exceed six (6) feet in length. (4) Bond of gas piping. (a) Gas piping shall not be used as an electrical ground. (b) Gas piping shall be bonded. Metallic gas piping shall be considered bonded if it is connected to the terminal on the chassis of the manufactured home by clamps, solderless connectors or by suitable ground-type straps. (5) Pressure tests. (a) Before the gas supply may be turned on, each manufactured home must pass a pressure test at the installation site. (b) Before appliances are connected, the piping shall withstand a pressure test of at least six (6) inches mercury or three (3) PSI Gauge for a period of not less than ten (10) minutes without showing a drop in pressure. Pressure shall be measured with a mercury manometer, slope gauge or equivalent device calibrated to read in increments of not greater than 1/10 pound. The source of normal operating pressure shall be isolated before pressure tests are made. The temperature of the ambient air on the piping must remain constant throughout the test. (c) After the appliances are connected, the piping system must be pressurized to not less than the pressure the supplier furnishes to the manufactured home's piping. All appliance connections shall be checked for leakage.