Instructions for assembling a good extension cord

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Most often, the desire to make an electrical extension with your own hands arises when there is an urgent need( for example, during repair) or when you are disappointed in the finished products from the manufacturers. And in truth, not a rare case when, when you connect to the transfer of a washing machine or another electrical appliance, the socket starts to melt and turn yellow. This is due to the fact that manufacturers save on cable cross-section and assembly quality, which entails inability to withstand network loads. To prevent this from happening, you can independently make a powerful electrical extension, spending literally half an hour and a little money. Further, the readers of "Sam Electrician" will be given a simple instruction and useful advice from our specialists!

Carrying So, first of all we understand what can make a good electric extension cord at home:

  1. Demountable electric plug. You can cut it off from a failed electrical appliance, or you can buy a new one. Requirement for the plug - it must necessarily be grounded. Demountable electric euro-screw
  2. Three-core cable of the required length. Here you need to pay attention to the purpose of the future homemade. If powerful electrical appliances are connected( for example, a welding machine), the diameter of the cores should be suitable. It is better to calculate the cross-section of the cable in terms of current and power in advance, so that in future you do not face such problems as socket fusion and short circuit. Most often, when assembling an extension cord for an electrical outlet, a PVA wire 3 * 1.5 and a PVS 3 * 2.5 wire are used at home. Three-wire wire ПВС
  3. Block of outlets( or one single).There are also several main requirements: the back wall of the outlet must be closed, the product must have grounding contacts, the construction must be made dustproof and waterproof. If all these requirements are met, the safety issue of using such an electric carrying will not excite you in the future.

As for the tools, you may need the following:

  • multimeter( will allow to check the extension cable after assembly);
  • curly and straight screwdriver;
  • pliers or special tool for stripping wires;
  • sharp knife;
  • insulating tape.

On an example we will consider, how most to make the electric extension cable from three-core cable with sockets on 4 nests. So, the assembly instruction is as follows:

  1. We twist the plug and the socket block to prepare the places for fixing the cores.
  2. Remove the top cable sheath on both sides by 4-6 cm.
  3. We clean each wire by 10 mm, as shown in the photo below. Stripped wires of wire ПВС
  4. Insert the cores into the appropriate terminals and tighten the screws with a screwdriver.
  5. We twist the outlet block and the plug in the reverse order. If the cable is hanging in the hole, wind up some insulation to make the seat more dense. Twisting the Euro-screwdriver with a screwdriver
  6. Using a multimeter, we call a self-made electrical extension cord. If everything is correct, turn the plug on straight into the mains and use it. Product continuity test

That's the whole instruction for creating. We hope that now you know how to make an electric extension cord with your own hands at home. If suddenly you have any questions, ask them to our experts in the category of "Q & A"!


I would like to additionally note that it is possible to make a more reliable version of the electrical extension with a switch in the form of a button. In this case, you can turn off or turn on the power on the sockets. If you decide to collect a long carry( for example, at 50 meters), then it is better to wind it on a special coil so that the wires do not get tangled all the time. In addition, the coil is more convenient to store than the bay of wires.

We also recommend viewing a visual video lesson:

Video instruction for assembling a self-made extension cable
YouTube Trailer

We recommend you read the article: why the socket will spark when the plug is turned on!

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