I have a circuit that has a couple outlets and they used 2 wire no grounds. Can I replaced the wire with 3 wire for the outlets and add new 3 prong outlets. It is a long difficut way back to my panel ground bar to run a ground wire for the two wire power source. I have another 240 circiut used for a 4' baseboard heater near my outlets. The baseboard has 3 wire and is grounded back to the panel. Can I run a green wire from the outlets to the ground wire used in the baseboard heater instead of running a seperate green wire back to the panel for the outlets ? Thanks.
I would avoid using the baseboard ground for the outlets since the baseboard is on a different breaker (circuit). Per NEC:
NEC 300.3(B) All conductors of the same circuit, including grounding and bonding conductors shall be contained in the same raceway, cable, or trench.
You can certianly replace the home run and associated branches with 3/12 (20 A) or 3/14 (15 A) depending on the circuit breaker size.