Final answer:
Loose connections can be a problem when splicing small sizes of stranded conductors using crimp-type connectors, particularly with aluminum wires. Special techniques must be used to avoid the issues caused by the higher rate of thermal expansion and oxidation of aluminum.
Step-by-step explanation:
When splicing small sizes of stranded conductors using crimp-type connectors, loose connections may be a problem. This is especially true when using aluminum wires due to their higher rate of thermal expansion compared to copper wires. Loose connections can lead to a possible fire hazard. Additionally, the oxidation of aluminum does not conduct and can cause problems. Special techniques must be used when using aluminum wires to ensure secure and reliable connections.