The Western Union Splice is made by twisting two ends of a wire together counterclockwise 3/4 of a turn each, finger tight. Then, using needle-nose pliers, the ends are twisted at least five more turns, tightly. The cut off ends are pushed close to the center wire.
What is a Western Union splice used for?
The Western Union splice is used wherever two lengths of wire are to be joined end‐to‐end. and it is particularly designed for those jobs where there is a likelihood of strain or pull being applied to the wires after the joint had been made.
What is a Western Union long splice?
The Western Union splice (fig. 5-30) is used when the connection must be strong enough to support long lengths of heavy, wire. this splice was used to repair telegraph wires. If the splice is to be taped, care should be taken to eliminate any sharp edges from the wire ends.
What is Britannia splice?
A britannia splice is used to connect 2 wires where there is a need to maintain high tensile strength, eg in overhead cables. A britannia splice is where you make a 90 degree bend to make a shoulder at the end of each wire, you then place them back-to-back and wrap a smaller gauge wire around the whole thing.
What is the use of Western Union Short tie splice?
It is done using two equal length of #14 solid wire that is twisted horizontally to create a twisted loop. The remaining untwisted wire is loop around the other. Western Union Short-Tie Splice — Widely used in interior wiring and is done similar to western union long-tie splice.
What is the best splice and joint to use when a wire is under heavy tensile stress?
Duplex cross jointThis is a two-tap wire turned simultaneously and is used where the two tap wire is under heavy tensile stress. Western Union Short-tie SpliceThis is the most widely used splice or joint in interior wiring installation to extend the length of wire from one point to another.
What is the use of Western Union Short-tie splice?
How do you make a knotted TAP joint?
—Knotted tap joint. The branch wire is laid behind the main wire. About three-fourths of the bare portion of the branch wire extends above the main wire. The branch wire is brought under the main wire, around itself, and then over the main wire to form a knot.
What is wrapped tap or tee joint?
Wrapped Tap, Tee Joint is used on large solid conductors where is difficult to wrap the heavy tap wire around the main wire. Ordinary Cable Tap or Tee Joint is used where large stranded wire or cables are tapped to a through conductor.
When to use a Western Union long tie splice?
Western Union Long Tie Splice is used extensively for outside wiring and is quite similar to the short tie splice. It is also being used for interior wiring. The difference is that a number of long twist are made before wrapping the end turns. This is done so to withstand greater stress of pressure on the wire.
Where do you place a wire for a splice?
The wire for this splice are bared about 4 ½ inches. They are then placed in the form of an X at a point midway between the insulation and the end of the base wire. Five or six long twists are then made and each side those turns are wrapped.
When was the Western Union Lineman splice invented?
The Western Union splice or Lineman splice is a method of joining electrical cable. It was developed in the nineteenth century during the introduction of the telegraph. This method can be used where the cable may be subject to loading stress. The wrapping pattern design causes the join to tighten as the conductors pull against each other.
When to use a scarfed or Britannia splice?
Scarfed splice. It is used only on a large solid wire where there is an objection to the bulkiness of the Western Union or Britannia splice. The wires are bared for about 3 inches when a No. 6 wire is used. The bared wire is then filed to a wedge shape starting about ½ inch from the insulations.
