1 2 3 Figure 4-102.  Stripping wire with hand strippers.  Figure 4-101.  Light duty hand wire strippers.  4-59 terminals accommodate more than one size of wire; the  insulation is usually color coded to identify the wire sizes  that can be terminated with each of the terminal lug sizes. In addition, preinsulated terminal lugs contain an insulation  grip (a metal reinforcing sleeve) beneath the insulation for  extra gripping strength on the wire insulation. Preinsulated  Copper wires are terminated with solderless, preinsulated  straight copper terminal lugs. The insulation is part of the  terminal lug and extends beyond its barrel so that it covers a  portion of the wire insulation, making the use of an insulation  sleeve unnecessary.  [Figure 4-103] Terminal lugs are generally available in three types for use  in different space conditions. These are the flag, straight,  and right-angle lugs. Terminal lugs are crimped, sometimes  called staked or swaged, to the wires by means of hand or  power crimping tools. Electric wires are terminated with solderless terminal lugs  to permit easy and efficient connection to and disconnection  from terminal blocks, bus bars, or other electrical equipment.  Solderless splices join electric wires to form permanent  continuous runs. Solderless terminal lugs and splices  are made of copper or aluminum and are preinsulated or  uninsulated, depending on the desired application. Splicing of electrical cable should be kept to a minimum and  avoided entirely in locations subject to extreme vibrations.  Individual wires in a group or bundle can usually be spliced  if the completed splice is located where it can be inspected  periodically. The splices should be staggered so that the  bundle does not become excessively enlarged. Many types of  aircraft splice connectors are available for splicing individual  wires. Self-insulated splice connectors are usually preferred;  however, a noninsulated splice connector can be used if the  splice is covered with plastic sleeving secured at both ends.  Solder splices may be used, but they are particularly brittle  and not recommended. 4.  Remove stripped wire. Solderless Terminals and Splices Copper Wire Terminals