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4 wire 240vac machine 3 wire supply

Question asked by 3dmapmaker on Nov 15, 2018
Latest reply on Nov 22, 2018 by drc

Is it legal to have a 4 wire machine connect to a 3 wire service. The machine is 240 V for all components in it except a 120v heater. L1 goes to one side of the heater and a neutral is connected to the other. The is a ground to the heater housing also. The neutral is bonded at the entrance to the machine to ground. Only 3 wires leave the machine. L1 L2 and Ground.