Our electrician had PVC coated tie wire.

When our new home was being built, I watched the contractor drag in many coils of wire. I watched as they use stainless steel bar wire to connect the rebar that would make my foundation more durable. I watched them bring in wire coils for the electricity. It surprised me to find that the stainless steel bar wire used to lash the rebar together was basically the same tie wire used in the electrical system, but it was PVC coated. PVC coated tie wire is a tie wire made of plastic coated wire. PVC wire has the core wire of electric galvanized wire with a plastic coating on the outer layer. The inside wire and the PVC coating are combined‌ together, which offer a stronger protective layer and gives longer service life. This creates a PVC coated tie wire with anti-aging, corrosion-resistent, anti-cracking characteristic. PVC coated tie wire has a longer service life than common galvanized tie wires. It comes a multitude of colors which help them ‌see which wire is hot and which is not. PVC coated tie wire is mostly used in an environment where good corrosion resistance in a necessity, such in homes or other buildings. It was easy to see why galvanized tie wires and other tie wires were important in the construction of a home or other buildings. I stood there for the longest time, watching the contractor and his electrician run wires through the walls. It wasn’t until I suggested they change where they were going to put my fan lights ‌that he asked me to leave. I wanted them all esthetically placed, but he thought he knew better.
16 guage double loop wire ties