An oven is a small but powerful kitchen appliance. Buying a new one, when trying to organise your kitchen, and transporting it home is only the start of the electrical installation adventure. It has more power requirements to operate than other kitchen appliances. Add to that; there’s the issue of an extra wire or two that you need to install in a safe manner.
Thus, you must take extra precautions when installing one. While wiring an oven is not rocket science, it can still be dangerous if you aren’t familiar with it. You will learn in this tutorial how to hardwire your oven and avoid any potential harm, so let’s do this!
Electrical circuits and regulations
If your oven type is more powerful than the one you previously had, you will almost certainly need to build a new circuit to power the appliance.
Dedicated circuit installation, on the other hand, must be done by a certified Part P electrician. With that being said, if you can still use your present circuit and cooker control unit, you are free to connect your new oven.
How to hardwire an oven on your own step-by-step
Let’s take a look at the steps that you have to follow:
Step 1: Find a clear spot for the control device to connect the oven to the wall
The new electric oven will most likely be installed in the same location as the old oven/gas hob in your home. Instead of being right in front of the control unit, try to keep the oven to the side. It keeps the heat from directly hitting the wires. Because the wires are so short, you won’t be able to move the new cooker very far.
When it comes to placing a new unit, you usually don’t have much of a say. It should be in close proximity to the control unit and isolator switch. If you want to relocate it, see a qualified electrician about rewiring your whole property.
Also, when you have a single oven, make sure it’s not going to sit on top of wallpaper or other flammable materials.
Step 2: Turn off the power
Locate the fuse box or circuit breaker in your home. It’s usually tucked away in a corner of the garage or basement.
Once you’ve found it, look for the power switch for the hob control circuit, which should be labelled and then flip the switch to turn off the power. Check recessed areas, such as hallway closets, if you can’t find the fuse or circuit breaker panel. It can also be somewhere outside, near the electrical metre.
Consider securing the fuse or MCB panel after deactivating the switch so that no one would unintentionally reactivate the power while you’re working.
Step 3: Remove the backplate from the terminal outlet box on the oven
Examine the backside of the oven while it is away from the wall for a little box. The box is normally black and positioned on the machine’s bottom right side.
A screw-on panel may be covering it, which you can remove with a crosshead screwdriver. So, turn the screws counterclockwise to remove the panel and expose the wire terminals.
If the box doesn’t contain any screws, carefully peel the cover off using a flathead screwdriver. Generally, you can raise it by simply slipping the screwdriver below the bottom edge.
Step 4: Loosen the terminal screws inside the outlet box
The electrical lines are held in place by these screws. The terminal box on the oven will most likely contain six screws, but you only need to loosen three of them, so use a crosshead screwdriver starting from the top right and then turn the screws counterclockwise.
The screws here do not need to be removed. You will only want to loosen them just enough for the wires to be plugged into the terminals. You can always go back and loosen the screws a bit more if the wires don’t fit well.
A sticker on the back of your unit close to the electric cooker switch may also explain how the terminals work. You can always check your oven’s user manual if you are in doubt.
Step 5: Connect the power cables to the terminal slots on the outlet box
The power line for the oven is made up of three distinct coloured wires. Each wire is colour-coded and connects to a unique outlet terminal.
Find a blue neutral wire that fits into the upper right terminal. The brown wire should be inserted into the middle-left terminal, while the ground yellow and green wires should be inserted into the bottom-right terminal.
The ground wire is usually exposed since it lacks a casing, so it is highly recommended that you get an electrical wire sleeve to prevent it from shorting out or shocking you. The sleeve is a piece of insulation that wraps around the wire for safety reasons. It is usually green or yellow in colour.
It’s worth noting that new ovens come with the necessary power wire. Make sure it’s the proper size, and consider using a heat-resistant cable with a diameter of 2.5 mm and a 13amp plug socket.
Step 6: Close the connections and outlet box by tightening the screws
Tighten the terminal screws by turning them clockwise with a crosshead screwdriver. Make sure the wires can’t be pulled out of the terminals.
Cover the outlet box when you’re finished, tightening any screws that hold it in place. Make sure there are no loose wires protruding from the box. If any are found, open it back again and neatly store them in the outlet box.
Step 7: Use a multimeter to test the control unit and make sure it is not active
Make your way over to the wall-mounted control unit. Now, turn on the handheld digital multimeter after connecting the red and black leads to it. Set it to V, or alternating current volt.
Insert the black lead’s tip into the ground wire terminal, and then the red lead into the live wire slot. The multimeter will remain silent at this point and display a 0 on its screen if it is not receiving any signal. You can now test the leads by shifting them to the other terminals and check to see whether the multimeter reacts in any way.
Remember to turn off the electricity by using the double pole isolating switch in conjunction with your home’s circuit breaker or fuse box. Working on a live outlet is dangerous, so always use a multimeter to double-check it!
Step 8: Remove the screws now to open the wire terminals on the unit
The device contains small outlets identical to those found in the terminal box of the oven. There are three terminals on a conventional consumer unit.
Turn the screws counterclockwise to loosen and remove them from the terminal. The power lines will then be able to fit into open slots. In most cases, the screws do not need to be removed in order to install the wires.
Step 9: Connect the wires to the terminals on the wall-mounted control unit
Basically, the wire colours on the oven should exactly match those on the control unit.
Place the insulated part of each wire flat against the device before pushing the exposed ends into the open slots. Then, tuck the exposed ends in with a screwdriver so that they can touch the unit’s wires.
Step 10: Replace the terminal screws to secure the power lines
Place a single screw on each terminal and turn it clockwise until the wires can’t be dragged out of place any longer. Before closing the control unit, double-check that the cables are neat and enclosed.
The oven will not work properly if the wires in the box are frayed or loose. Take your time with the wiring before reactivating the electricity because it could harm your oven or cause other issues.
Step 11: Check your work for errors
Seek the advice of a professional electrician to ensure that your wiring is correct and up to code. Make sure that they certify the job. What do we mean by that?
The electrician will issue you a certificate confirming that your job has been completed correctly. You can then relax and enjoy your oven without fear of negative consequences. Even if your hardwired oven is all good, not having a certificate could be an issue.
The certificate will attest to the fact that your home is secure and compliant with government laws. You may not be qualified for property insurance if you don’t have it, and you may have a difficult time selling your home in the future. When it comes to electrical work, homeowners are aware of the fact that hardwiring is a very delicate business and so getting a second opinion is always useful.
As you can see, even minor electrical work needs a great deal of patience, research, and planning, but it is possible when you do it carefully and with the right mindset. Follow the instructions above, and you will soon be cooking your favourite meals!