Insulating your electrical copper wiring will protect your wire from the elements, and, most importantly, will protect the wiring from catching fire. Most electrical wire y is insulated, but you should avoid using uninsulated wiring because there is a risk of fire and electrical shorts. Insulate your wire as a last resort. You should try to replace it with insulated wire, preferably nonmetallic sheathed cables.
1. Install PVC conduit at the location where you want to use your uninsulated wire and glue with fittings and PVC solvent cement. Use the brush that comes with the PVC solvent cement to spread a thin layer and hold the conduits together for 30 seconds until the solvent dries. You must run a separate PVC conduit for each cable if they are uninsulated.
2. Connect conduits to a plastic electrical box. Push the conduit into the hole of the electrical box and secure in place with electrical conduit box connector by snapping the connector on. Do not use a metal box if your cable is uninsulated.
3. Wrap end of cable on wire puller, so it forms a knot at the tip of the wire puller. Wrap the tip of the wire puller with electrical tape to secure the wire to the wire puller. Leave the cable unrolled so you can push it easier through the conduits.
4. Pull cable through electrical conduit with the wire puller. Use wire lubricant if it gets stuck. Squirt the entrance of the electrical conduit until its covered with lubricant and the tip of the wire puller with wire lubricant to ease it through the conduit.
5. Connect cable to intended receptacle in the plastic electrical box.
6. Wrap all exposed wires in the electrical box with electrical tape. This will prevent the wires from touching and shorting.