I just purchased a dayton g73 electric heater for my garage. I wired it with a 30 amp circut breaker, 10 guage 3 wire. I used the black and the red wires for the power or hot wires and I grounded the ground wire. My question is where do I put the white wire, there doesn't seem to be a place in the heater for this wire?. Do I need this wire?. The heater works, but doesn't seem to get very hot, any suggestions?

Hello all first post. I am doing up my basement, or well trying. I have foam board insulation up studs, and floor done. 4yr old house with a cutler-hammer breaker box. there is 2 existing lrg heaters down stairs already, heater info now for both are OFM1250 - volts 240 watts 1250 amps 5.21. Both are the same and hooked up to 14/2 red wire to the elect box on a dbl breaker with info CH, BR420, DNPL220220, types BRD, A & DNPL, HACR type, 4 pole unit J969 E7819-T Now i have no idea how many watts or amps i can have on this dbl breaker. And by dbl i mean 4 breakers in all 2 in the middle hooked together and the 2 outside hooked by a sort of guard thing. i have installed plugs and lights before so im not new to electrical but heat i never touched before. My main idea is to take the other large heater and put in the room so there will be lots of heat possible in there. get a smaller one (750 watts, 3.31 amps)for the washroom and maybe another large for the other area of the basement. so i guess to sum up total watts 3x1250= 3750 + 750 = 4500 total amps 3x5.21= 15.63 + 3.31 = 18.94 is this ok or should i put in another breaker. oh not sure if this matters but 2 heaters in the rm will be on its own thermostat 1 in the washroom and 1 for the other area. thanks in advance.