The wiring itself isn’t the problem, because aluminum does conduct electricity safely. The trouble comes at the connections.

In comparison, pure aluminium has only 61% of the electrical conductivity of copper by cross-section. Cross section of copper-coated aluminium (CCA) wire ... on all counts. Connecting these ...

which depends on a little prep work to end up only slightly more complex than soldering to copper. A typical way to make a reliable electrical connection to aluminum is to use a screw and a wire ...