Wiring of junction box by American wire twisting way. Connection begin from ground wire and use color codes valid in your region. Wires out of junction box should be fit in conduit or duct - depends on wiring codes in your region. 
<ul><li>NB! This way is strictly forbidden in Europe!</li></ul>
<a href="//commons.wikimedia.org/wiki/User:Dmitry_G" title="User:Dmitry G">Dmitry G</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>