Knowing how to make a heating coil will help you in many ways. This plays a vital role in running appliances like dryers or coffee makers.
If you can replace it when the previous coil runs out, you won’t need to bear the extra expense.
The question arises: how to make a heating coil?
Firstly, you need to take note of the voltage. You can determine the length considering the resistance. Now that you’ve gotten the coil, start by wrapping it around a copper tube. Then check the connection by temporarily connecting the coil. Finally, ensure that it’s working fine.
That was just the outline. This process involves a lot of other things as well. Stick with us till the end to enlighten yourself more.
Time and Cost Estimation of Making Heating Coil
As soon as we decide to make an electric coil at home, the question of time estimation arises. Basically, you’ll need around an hour to make the coil.
After time estimation, let’s focus on the cost estimation now. You must have an idea about the cost when you’re moving your garage. Now, let’s look into the cost of making a heating coil.
The cost of replacing the heating coil is slightly higher. The limit is around $550-1000. But the parts don’t cost much individually. You can get them for around $80-230.
You know that the labor cost is the most of it. So, doing it by yourself can save a good amount of your money.
5 Step Guide on How To Make a Heating Coil
Heating coils come in two types. Open electric heating coils can be used in anything from the coffee machine to the dryer.
Covered electric heating coils can only be manufactured. They can even be replaced only by certified HVAC contractors.
In this case, we’re focusing on making open heating coils. So, following our step-wise guide will result in a perfect coil for your appliance.
Let’s start without any delay!
Preparing the Necessary Equipment
We’ve already gotten an idea about the importance of heating coils. Therefore, we know how crucial this process is. So, getting prepared beforehand will be wise. Here we’ve included the list of the tools.
Prepare your toolbox accordingly. The list goes as follows:
- Nichrome wire
- Copper tube
- Notebook and Calculator
- Electric tapes
- DC power source
You might have this question: why did we choose nichrome wire? Because it has higher resistance that increases the heat. Moreover, the thicker the wire, the more it will produce heat.
Nichrome wires are also a cost-efficient option.
Choosing the material for your heating coil is very important. Here we’ve added some of our best picks of nichrome wire. This will help you to choose the best product-
Grab one from here before jumping into the step-wise coil-making guide.
Step 1 of 5: Measuring the Required Voltage
If you’re replacing an old and outworn coil, the drill is easy. The required voltage will be the same as before. You can easily find it in the manufacturer’s guide.
When you’re creating a new coil, you need to know the voltage. You can try to find it in the manual guide of the particular appliance. If you can’t find it in the manual, then you must calculate it.
The formula used is V=IR where V stands for Voltage and I for electricity and R for resistance. Just note down your electricity flow in Amperes. You should also check the resistance of that particular conductor.
For instance, if your current supply is 10 Amp and the resistance of the wire is 23 Ohm. Then the voltage will be V=(10*23)= 230 volts.
Once you know the voltage, let’s move on to building the coil-
Step 2 of 5: Determining the Length and Building the Coil Accordingly
Determining the length depends on the resistance of the wire. It also varies from appliance to appliance. The common equation is L= R/r, where L= length of wire, R= resistance, and r=resistance per meter.
You can get the two pieces of information from the wiring manual. Then, calculate the length before starting to coil. Here’s an example- if R= 23 Ohm and r= 1.73 Ohm/m. Then the length, L=23/1.73=13.2 meters.
You must determine a length that’ll perfectly be placed inside. The way you need to measure all the aspects before placing an oven outlet.
The shape of the coil also depends on the space available inside the device.
After finalizing the shape, start to wrap the coil around the copper tube. The more turns the coil has, the more heat it’ll produce. After the coiling ends, keep one end open for connecting to the heating source.
Step 3 of 5: Connecting to the Power Source
After building the coil, it’s time for a temporary connection. Connect the open wire ends to the power source.
A simple DC power supply will be enough for this purpose. The more current will go through the coil, the higher amount of heat will be produced.
Don’t make the mistake of applying more power that exceeds the capacity of the wire. Check the manual to know its capacity.
If the power source doesn’t work properly, replug them and check again. If your receptacle is being hard to plug in, troubleshoot it. Then try again.
Don’t tighten the screws before making sure the heat source is perfectly attached. If the heat source fails to provide desired heat, you might consult an expert.
Step 4 of 5: Finalizing the Heating Coil Set-up
After confirming that the temporary connections are working properly, it’s time for setting them. Connect the wire ends with the power source. Then wrap them up with the electric tapes. Make sure that no wire ends are exposed.
Putting the heating coil in the allocated space inside the appliance, connect it properly. Then tighten all the screws. Now, the coil is all ready to work.
Step 5 of 5: Testing the Final Connections
Now start the device and check if it’s working fine or not. Set it to different temperatures and check.
If you’re using it in a dryer, change the modes and check. In case of any appliance, carefully check if it sparks or shows any problem. If not then hurray, you’ve successfully made the heating coil.
Now that we’re done with making the coil, it’s time to say goodbye. But remember this process includes working with heat and electricity. So try using thick latex gloves for your safety.
Question: What are heating coils made of?
Answer: Heating coils of home appliances are commonly made of Nichrome. This is an alloy of nickel and chromium. It has a higher melting point and is very flexible for use. Thus it’s utterly popular for regular uses.
Question: How do heating elements fail?
Answer: Getting extremely hot can ruin heating elements. This is one of the major causes of heating coil failure. Some devices fail due to the element getting dry-fired. When the heating element isn’t submerged in water(elements that require this), it gets dry-fired.
Question: Does more resistance mean more heat?
Answer: According to Joule’s equation, the heating effect is directly proportional to resistance. Hence increasing the resistance can increase the heat. Higher resistance of the conductor can produce more heat.
That’s all from us. This post should answer all your questions on how to make a heating coil.
By the way, if you lack basic knowledge about electrical connections, please consult an electrician. Don’t take drastic decisions otherwise, it might result in severe consequences.
Hope this read will help you to make your own coil. Best of luck!