Wall oven, furnace and water heater wiring

Reply

  #1  
Old 01-01-16, 10:03 PM
Member
Thread Starter
Join Date: Jan 2016
Posts: 2
Wall oven, furnace and water heater wiring

Hello.

We are renovating our kitchen with plans in the future to do other rooms. Currently we have a propane oven and furnace. We want to eventually switch the oven and furnace to electric and move the water heater to a better location (it won't move much, just 5 feet or so).

Since we are ripping out everything, including walls and insulation, we are able to run new wire now. To be clear, I don't mean hooking the wire up to anything, just getting it in place to eventually be hooked up since it is easier now before we put up the new dry wall.

I just didn't know what wire we should run. I assume each of these will need its own breaker and when we are ready to hook the new appliances up we will hire an electrician to hook the wires up to the breaker.

Thanks so much in advance!
 
Sponsored Links
  #2  
Old 01-01-16, 11:12 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 46,164
Welcome to the forums.

switch the oven and furnace to electric
An electric oven..... is a wall mounted oven only OR stove/range ..... oven and cooktop ?
An electric furnace or a heat pump system.... with A/C or without A/C ?

I think you need to research what you may want to switch to in the future before deciding on what cable to run.
 
  #3  
Old 01-02-16, 12:27 AM
pcboss's Avatar
Forum Topic Moderator
Join Date: Jul 2002
Location: Maryland
Posts: 14,587
Agreed, the heat pump might need up to 90 amps depending on the backup heat.

The WH will need a 240 vo,t 30 amp circuit with 10-2 wiring.
 
  #4  
Old 01-02-16, 10:29 AM
CasualJoe's Avatar
Member
Join Date: Jan 2010
Location: USA
Posts: 9,385
A freestanding electric range and electric water heater are easy to plan for, but the heating isn't quite that simple. Most heat pumps are installed along with a conventional electric furnace which provides the air handler function as well as the emergency heat function. Regardless, the furnace needs to be sized to the full heating load. You need to have the heat load calculated and the furnace and heat pump or A-C unit sized before you can plan the wiring for them. Electric furnaces are typically sized by KW ratings such as 10, 15, 20 and 25 KW. You need to know what size as well as how many circuits the furnace will need; could be one, two or three.

My guess is that you'll need to upgrade to a 200 amp electric service. In addition, you'll need to talk to your electric utility about the new loads so they can evaluate the transformer and service drop requirements.

Just curious, what city are you in or near?
 
  #5  
Old 01-02-16, 11:57 AM
Member
Join Date: Nov 2012
Location: USA
Posts: 3,314
Hi, you may also want to contact the electrician you plan to hire to be sure he is OK with you running the cables,rough wiring should be inspected before any drywall is installed.
 
  #6  
Old 01-02-16, 08:03 PM
Member
Thread Starter
Join Date: Jan 2016
Posts: 2
So sorry for not including more info. We are in a trailer and would likely only go up to a 50 gallon tank for the water heater. For the electric furnace not sure what we will get, but it would need to be tall and skinny to fit the spot. I understand the main issue with mobile homes is the small vent system, but prior to all this we plan to change it all out for standard.

We are not looking at a A/C heat unit, just a simple furnace. For the oven it is not a range or double oven. Just a single wall oven, however I am wanting one with convection if that makes a difference.

What I really want to know is what gauge/ type wire these items would need to get the wire in the walls before we drywall.

Thanks again!
 
  #7  
Old 01-02-16, 09:58 PM
Member
Join Date: Nov 2015
Posts: 914
Standard residential electric water heater is 30A no matter what size it is. So, pull 10-2 wire and install 30A double pole breaker for it.
If current water heater is electric, simply extend wire to new location. (in junction box of course.)
By wall oven, do you mean built in oven that goes inside cabinets?
Some of those require only 30A and most require 40A and most of them are hardwired.
Pull 10-3 (3 wires + ground) for 30A or 8-3 for 40A. Double pole 30A or 40A breaker.
If you don't know what you will get, just pull 8-3 and choose breaker size later. That is no problem putting larger size wire than required other than being harder to work with.

If you mean oven range (one with stove on top), most of them uses 40A and some 50A.
Pull 8-3 for 40A or 6-3 for 50A. Double pole 40A or 50A breaker.
Then install NEMA 14-50 Outlet (can be surface mount or wall mount. Wall mount will require double gang junction box). This is 50A 4 prong outlet.

As for the furnace, it really depends on what you are installing, but I doubt that it will be more than 50A for trailer home. You will probably need 6-2 wire. If think you need more than pull 4-2 wire to be safer (Up to 70A on 4-2 NM-B).

All the wires I mentioned are NM-B, which is standard romex wires.

Use following chart.
Ampacity Charts
 
  #8  
Old 01-03-16, 08:05 AM
CasualJoe's Avatar
Member
Join Date: Jan 2010
Location: USA
Posts: 9,385
Again

Electric furnaces are typically sized by KW ratings such as 10, 15, 20 and 25 KW. You need to know what size as well as how many circuits the furnace will need; could be one, two or three.
Talk to your heating guy, you cannot plan for the wiring without knowing what size furnace and how many circuits are required.
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes