Twisting the wires tight enough can be difficult, so consider the “modified” Lineman splice shown at :58 in the video above. This wraps the wires together then twists them back onto themselves.

Cutting Wires Too Short Trying to connect together, aka splice, tiny little wires in an electrical box is difficult, and any resulting bad splice can cause electrical arcs and fires.

Mistake: Box too small | Too many wires stuffed into a box can cause dangerous overheating, short-circuiting and fire. The National Electrical Code specifies minimum box sizes to reduce this risk.