insulators are highly heat resistant. When using the hot-blade stripper, make sure the blades are clean. Clean the blades with a brass wire brush as necessary. ">
General Wire-Stripping Instructions
When stripping wire with any of the tools mentioned, observe the following precautions:
Q.1 What are the basic requirements for any splice or terminal connection?
TYPES OF SPLICES
There are six commonly used types of splices. Each has advantages and disadvantages for use. Each splice will be discussed in the following section.
Western Union Splice
The Western Union splice joins small, solid conductors. Figure 2-5 shows the steps in making a Western Union splice.
Figure 2-5. - Western Union splice.
Prepare the wires for splicing.
Joining small multiconductor cables often presents a problem. Each conductor must be spliced and taped. If the splices are directly opposite each other, the overall size of the joint becomes large and bulky. A smoother and less bulky joint can be made by staggering the splices.
Figure 2-6 shows how a two-conductor cable is joined to a similar size cable by using a Western Union splice and by staggering the splices. Care should be taken to ensure that a short wire from one side of the cable is spliced to a long wire, from the other side of the cable. The sharp ends are then clamped firmly down on the conductor.
The figure shows a Western Union splice, but other types of splices work just as well.
Figure 2-6. - Staggering splices.
A splice that is used in a junction box and for connecting branch circuits is the rattail joint (figure 2-7).
Figure 2-7. - Rattail joint.
Wiring that is installed in buildings is usually placed inside long lengths of steel or aluminum pipe called a conduit. Whenever branch or multiple circuits are needed, junction boxes are used to join the conduit.
To create a rattail joint, first strip the insulation off the ends of the conductors to be joined. You then twist the wires to form the rattail effect. This type of splice will not stand much stress.
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