How do I Do Compression Reducing Splices for Copper Wire?

Select a reducing compression splice of the correct size for the cables to be joined. Check the manufacturer̵7;s data sheet, and note the length of bare wire to be inserted in the barrels, or sockets, of the splice. This information may be marked on the body of the splice.

Strip insulation from the end of each wire. Ensure the bare end is of the correct length to fit snugly into the compression splice. If the splice has inspection holes, check the length is correct by inserting each wire in turn into its barrel. You should be able to see the end of the wire through the inspection hole.

Find the size of die needed to crimp the larger of the two wires. This information may be marked on the body of the splice. Insert the die into the crimping tool in accordance with the manufacturer̵7;s instructions. Some crimping tools have dies that are an integral part of the tool.

Insert the larger barrel of the splice into the die in accordance with the manufacturer̵7;s instructions, but do not exert crimping pressure. Hold the splice in place, and insert the prepared end of the larger wire into the barrel. Crimp the joint with the crimping tool, ensuring that the end of the wire remains firmly in the barrel.

Open the crimping tool and remove the splice. Check the crimped barrel for any visible defects. Find the size of die needed to crimp the smaller of the two wires, and insert it into the crimping tool.

Insert the smaller barrel of the splice into the die, without exerting crimping pressure. Hold the splice in place, and insert the prepared end of the smaller wire into the barrel. Crimp the joint with the crimping tool, ensuring that the end of the wire remains firmly in the barrel.

Remove the splice from the crimping tool. Check the crimped barrel for any visible defects. Wrap electrical tape around the joint to insulate it.