Home Improvement

Home Improvement

# We are replacing a stove with an oven and a separate cook top.

The power line for the...
We are replacing a stove with an oven and a separate cook top. The power line for the old stove has the expected four wires: two hot ( black and red ), white " return" and green ground. The new oven also has a power cord with the same four wires. But the cook top only has three wires: hot black and red and a green ground. The installation instruction say to connect the black to black and red to red and the green to ground. How does that work without the white return? The line from the main panel to connect to the cook top does, of course have the four wires. What do I do with the white coming from the panel. Isn' the white needed to complete the circuit ?
Show More
Show Less
5/16/2013
Steve G., Handyman
Category: Home Improvement
Satisfied Customers: 17,987
Experience: VP of electronic repair company and home theater advisor.
Verified

Hello there and welcome to Just Answer. My name is XXXXX XXXXX I will be assisting you today. I am an engineer with over 30 years of electrical and electronic training, repair and installation experience. I will try and answer your question accurately and precisely so that we can get you on your way.

In a 4 wire system i.e. two hots, a neutral and a ground, and in a residential electrical system, you can derive both 240V and 120V from the same set of wires.

If you measure the voltage from either of the hots to the neutral, you will get 120V. Across the two hots and you have 240V because the two 120V sine waves are 180 degrees out of phase with each other. Think of it as +120V and -120V. The difference is 240V.

Your old stove and you new oven uses the 240V for the heating elements and probably uses the 120V for the controls, lights etc. The new cook top only needs 240V so therefore no neutral is required.

I hope that explains it for you. Let me know if you need more help.

Steve

Customer reply replied 4 years ago

Ok I understand the theory/principle. Now for the practical:
Right now the four wires coming from the panel are connected to the panel with the black and the red into one 40 trip switch fuse each and the white Just to the neutral bar. The two trip fuses are connected to one handle. If I connect the three wires of the cook top to the outgoing four wire what happens to the white? It is connected to the bar of the panel, but has no connection where I connect the cook top power word to the line to the panel. Would it be best to run the cook top wires to a plug and the wires from the panel to an outlet rather than connecting directly. It would still leave the white an orphan.

You can either disconnect the white at the panel or do what most people would do and simply wire nut and tape the neutral conductor at the outlet box. As it is right now, you can touch the neutral. It carries no voltage or current. It is safe but you want to tape it up in the box so that it doesn't make contact with any other wire and cause a short.

This is done all the time and completely within code.

Steve

Steve G., Handyman
Category: Home Improvement
Satisfied Customers: 17,987
Experience: VP of electronic repair company and home theater advisor.
Verified
Steve G., Handyman
Category: Home Improvement
Satisfied Customers: 17,987
17,987 Satisfied Customers
Experience: VP of electronic repair company and home theater advisor.

Steve G. is online now

A new question is answered every 9 seconds

• Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
• Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

## What Customers are Saying:

You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future.

JimmyBagley, IA

Thank you for the expeditious answer. It's good to know you're out there and awake in the wee hours when I finally have time to ask questions about my Jenn Air.

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

< Previous | Next >

## Meet the Experts:

Brian

Architect

2,153 satisfied customers

Licensed Architect- 17 years, L.E.E.D. AP

The Home Smithy

Home Builder

2,084 satisfied customers

#1 Home Improvement Expert 30+ years experience

Steve G.

Handyman

17,987 satisfied customers

VP of electronic repair company and home theater advisor.

StructuralEng

Civil Engineer

14 satisfied customers

Eric M. Bright

We Don't Comprehend the Word Can't!

1,734 satisfied customers

I've been been doing things for my clients that others have said cant be done for over a 1/4 Century

Phil

Mechanical Engineer

682 satisfied customers

Retired contractor, 51 years experience

Rich

Home Improvement Enthusiast

674 satisfied customers

Over 35 years construction and home maintenance experience

< Previous | Next >

Related Home Improvement Questions
I have a leak in a copper 3/4 inch pipe, I'm assuming that
I have a leak in a copper 3/4 inch pipe, I'm assuming that it froze it's by the front door it's a very old house. I shut water off to house and it is still flowing with (it seems like pressure) can't … read more
Eddie
Home Improvement Contractor and Repairs
High School or GED
1,042 satisfied customers
The beeping continues on and on after I, open door and think
The beeping continues on and on after I cook, open door and think I am through. Not so, beeping has gone on two hours … read more
Eddie
Home Improvement Contractor and Repairs
High School or GED
1,042 satisfied customers
I installed a new remote garage door opener last weekend.
I installed a new remote garage door opener last weekend. After it was working I found the remote for my car didn't open the garage door. I later found that the car remote had somehow become unconnect… read more
Eddie
Home Improvement Contractor and Repairs
High School or GED
1,042 satisfied customers
I lost my craftsman garage door remote. Got a new one and i
I lost my craftsman garage door remote. Got a new one and i tired to resync it first by pressing the button on the back of the garage door opener and then the new remote. it then flashes when i press … read more
Eddie
Home Improvement Contractor and Repairs
High School or GED
1,042 satisfied customers
I have a Modine TLP radiant tube propane heater, I can see
I have a Modine TLP radiant tube propane heater, I can see the hot surface ignitor cycle three time but the gas does not flow to supply heat. I have verified that gas is available. How do I find out w… read more
Phil
Mechanical Engineer
Degree, Mech Engr Technology
682 satisfied customers
In a retail setting, is it required to provide a restroom(s)
in a retail setting, is it required to provide a restroom(s) to the public? if there is a restroom upstairs, is it required to provide ada restrooms downstairs? … read more
HVAC Guru
Service Technician
Associate Degree
682 satisfied customers
I have a Torquemaster plus garage door need assistance from
I have a Torquemaster plus garage door need assistance from a garage door professional … read more
Eddie
Home Improvement Contractor and Repairs
High School or GED
1,042 satisfied customers
Looking for an estimate per square foot replacement cost on
Hi, Looking for an estimate per square foot replacement cost on Manufacturing buildings in New Hampshire for the purpose of insurance renewal. Thank you… read more
Doris
Personal Property Appraisals
Bachelor
2,800 satisfied customers
What is this material between the marble and fireplace. It
Hey Rick, what is this material between the marble and fireplace. It is eroding away.I took these pictures looking up.Front of my fireplace has marble around it and the top piece has this material beh… read more
Rick the plumber
Owner
9,857 satisfied customers
We live in Maine. Our home is a one story contemporary ranch
We live in Maine. Our home is a one story contemporary ranch (modular stick built). We are going to be removing a wall between the dining room and kitchen to create an open flow. There is dead space i… read more
Rick the plumber
Owner
9,857 satisfied customers
I have a Genie GS1930 that is running slower than it used
I have a Genie GS1930 that is running slower than it used to. both the lift and drive function and does not move in slow drive mode. … read more
Eddie
Home Improvement Contractor and Repairs
High School or GED
1,042 satisfied customers
I have an LGLMXS30776S fridge that's not cooling. Maybe 2
I have an LGLMXS30776S fridge that's not cooling. JA: What's the make and model of the fridge? And can you guesstimate how old is it? Customer: maybe 2 years JA: Do you plan on doing the work yourself… read more
HVAC Guru
Service Technician
Associate Degree
682 satisfied customers
Well, my garbage disposal backed up.. and I read where you
well, my garbage disposal backed up.. and I read where you use uncooked pasta and running water to free it but now it just hums and doesnt turn so I think it's overloaded. … read more
Rick the plumber
Owner
9,857 satisfied customers
I have serious mold and mildew in my washing machine gasket
I have serious mold and mildew in my washing machine gasket that doesn't come out after I wash it. I've used bleach, baking soda and washing machine cleaning tablet but it is still three. What do I do… read more
Eddie
Home Improvement Contractor and Repairs
High School or GED
1,042 satisfied customers
Our home was damaged by a pipe burst...presently, a drying
Our home was damaged by a pipe burst...presently, a drying and mitgation company using fans and humifiers are drying out the house before the to dry out home. We need to have an electrician rewire the… read more
Rick the plumber
Owner
9,857 satisfied customers
I have a plumbing problemishes in my tub. I changed the
Second opinion] I have a plumbing problemishes in my tub. I changed the washers on the spindles (hot/cold/diverter) but when I turn off water it still has running for about 10 seconds. How can I fix t… read more
David Bowden
Owner
467 satisfied customers
I have a micro touch massage chair that has quit working.
I have a micro touch massage chair that has quit working. … read more
Susan Latta
Kitchen and Bath Designer, Contractor
Bachelor\u0027s Degree
110 satisfied customers
I have a regency gas fireplace that the pilot lights fine
I have a regency gas fireplace that the pilot lights fine but will not turn on. It has both a remote and manual switch underneath. Neither one makes it go on. I actually have four of these in my home … read more
David Bowden
Owner
467 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less