Fuse box
#12
Now, to the original question:
The best way to add on is to run a new circuit back to the source. Keep in mind that the original wiring and fuses were sized according to their expected use, and the current on the wire might already be approaching its rating, or the rating of the connectors.
The best way to add on is to run a new circuit back to the source. Keep in mind that the original wiring and fuses were sized according to their expected use, and the current on the wire might already be approaching its rating, or the rating of the connectors.