Yes, you can use outdoor wire indoors, but there are a few things you need to consider.
First, make sure the gauge (AWG) of the wire is appropriate for your application.
An outdoor wire is typically thicker (lower AWG number) than an indoor wire, so it may be too thick for some applications.
Second, make sure the insulation on the wire is appropriate for your environment.
An outdoor wire is typically insulated with a UV-resistant coating that won’t degrade in sunlight.
Indoor wire typically doesn’t have this coating and could potentially degrade over time if exposed to sunlight or other sources of heat.
Finally, check the rating of the fuse or circuit breaker in your electrical panel.
The rating of the fuse or breaker should be higher than the rating of the wire.
If it’s not, you may need to upgrade your fuse or breaker.
Why Is Outdoor Wire Cheaper?
The main reason outdoor wire is cheaper is that it does not have to be as strong as indoor wire.
Outdoor wire can be made from a lower grade of aluminum, which is why it is less expensive.
In addition, outdoor wires are not exposed to the same environmental conditions as indoor wires, so they do not need to be as thick or durable.
This also makes them less expensive.
So basically, the main reasons outdoor wire is cheaper are because it does not have to be as strong and it does not need to withstand the same environmental conditions as indoor wire.