It will not meet code if your area requires afci protection for those circuits, unless you can get a 2 pole afci breaker that is listed for use in you panel.

 

Other than what Jim says, your plan is fine to me.

I would land the red at the first receptacle and send black onward to the second, just to keep colors consistent. But that's just an OCD thing, like wanting 3-way switches to all-down when off.

Note that if you do need AFCI and your panel is GE, ask your GE dealer about their AFCIs that are made specifically for multi-wire branch circuits (MWBC) and don't need neutral.

That "neutral shared" thing is a MWBC. You must pigtail neutral, NOT use the receptacle screws to extend it. Also the two breakers will need a handle-tie so future maintainers turn both halves of the circuit at once.

 

Other than what Jim says, your plan is fine to me.

I would land the red at the first receptacle and send black onward to the second, just to keep colors consistent. But that's just an OCD thing, like wanting 3-way switches to all-down when off.

Took me a minute...... wow, you must be flipping those switches around all the time....

 

I would not run a #14, 15 amp circuit for plug in heaters, I would use #12 for 20 amp circuits. Likely the circuits will require AFCI, so I would run 2 separate cables.

 

20 amp circuits are seldom used in Canada. 15 amp is fine. If 20 amp is used then you are required to use 20amp T slot receptacles.

 

For 1500W, I wouldn't want to use any type of plug in heater. I've seen WAY to many melted receptacles/plug ends.

Do yourself a favour and go with 240V hardwired baseboard heaters. You'd only need 1 - 14/2 for both units, and you skip the AFCI requirement.
1 - 15A DP breaker.

 

That, 1000 times yes!

Cheapo box store plug-in space heaters are dangerous junk that start fires all the time. It's illegal to run them unattended (NEC 110.3(B); general negligence) and they're very expensive* to BUY.
"How can that be Harper? They are $15!" Yeah, but you have to replace them over and over.

If you're building infrastructure to support cheapo box store plug-in space heaters, you might as well use proper, built-for-purpose baseboard heaters such as Cadet units. I bet you never even thought of those because they must be so expensive. LOL try $35. $50 for a big one.

And if you really need a heater with a fan, they make those too.

These things are durable as can be - they last 30-40 years. And they don't start fires and it's legal to run them all day unattended. They are legal as the house's primary furnace.



You may notice most of them are 240V. Some are 120V and you can just use those... or, since you're putting in a MWBC anyway with 2 breakers and a handle-tie, you might as well go 240V. In fact:

• It saves you a neutral so you can use /2 cable.
• 240V circuits don't need to be AFCI. Which means you're net money ahead on day one.

Also, a 250V, 2000W space heater draws 8 amps. That means you can put 2 of them on a 20A/240V circuit.




\* and I'm not even talking about the electricity cost!

 

The cord caps can melt from heat inside from a loose connection, not just a loose receptacle cord interface.

 

If you are going to run circuits anyway meaning for the receptacles for the plug-in heaters PLEASE do yourself a huge favor and also much safer for your wife and kids and instead of installing two circuits for 120v receptacles for the plug-in heaters please run two separate circuits and use either 240v baseboard or fan forced wall heaters that are hardwired. They are 1,000 times safer than plug-ins.

Many people will use the plug-ins only because they are not running new circuits but you are planning on running the circuits anyway so take full advantage of the safety issue and rest better at night etc by going hardwired 240v. It is not complicated to do this. If you are not sure how to do this we can guide you and you will see it is not hard to do properly.

You can just use regular thermostats for now instead of WiFi to save some money and then later down the line you can always replace the inline thermostats with WiFi ones.

Plug-in heaters are so darn dangerous!!

 

I re-read your first post.

You are trying to run only one circuit instead of two.

Starting with a MWBC (14/3) to the first heater then from there continuing on with a regular 120v circuit using 14/2 gauge wire.

Use 12 gauge instead. Run 12/2 w ground from the panel to the thermostat and then to the first heater and then to the second heater. Make it a 240v circuit. Use hardwired heaters that are built in such as baseboard, wall forced hot air etc. This will need one 2 pole 20amp breaker. It will handle two heaters running at 1500 watts each on 240v on that one circuit and only needing the one WiFi thermostat. I think if you do the cost comparison of the difference between the 14/3 plus 14/2 for your MWBC to the 12/2 for the entire length of the circuit you will find the cost is cheaper. Figure costs involved on the diff's.

On the 14 gauge you can run the 1500 watt and the 750 watt but the 12 gauge at 240v you can run two 1500 watt heaters hardwired. It will even deal with the "continuous load" properly. Chances are since they will be warming up the area from cold to warm a continuous load will come into play.