Electric fence polyrope and polytape look like ordinary rope and tape, but the product is really a hybrid: a polymer jacket that gives the line its mechanical life, and a set of fine metal conductors that actually do the work of carrying the pulse. A rope that has the polymer right and the conductors wrong is a poor fence, regardless of how good the polymer is.
What the conductor is doing
The energizer sends a short, high-voltage pulse down the fence line. The animal touches the line, the pulse flows through the animal to the ground, and the animal learns to stay away. The voltage at the far end of the fence must remain high enough for the animal to feel a meaningful shock. As the line gets longer, the resistance of the conductors causes the voltage to drop — and a long fence with too few conductors, or with the wrong conductor material, will have a weak far end.
What the spec sheet should say
For polyrope and polywire, the minimum useful specification includes:
- Conductor material. Stainless steel, tinned copper, aluminum — or a mix. Each has different conductivity, corrosion resistance and price.
- Conductor count and diameter. The number of conductors and their diameter (typically 0.16 mm, 0.20 mm or 0.30 mm). More and thicker = lower resistance = better long-line performance.
- Twist pitch or braid pattern. How the conductors are laid into the rope. A tighter, more even braid means more reliable contact along the length.
- Resistance in ohms per meter (Ω/m). The single most useful number. Lower is better. A typical 6-strand stainless steel polyrope is in the low-single-digit Ω/m range; a 3-strand polywire may be several Ω/m.
- UV stabilization. The polymer jacket must be UV-stabilized for multi-season outdoor use. Specify the expected service life.
- Breaking load. The mechanical strength of the rope, important for permanent and high-tension fences.
Polyrope vs polywire vs polytape
- Polywire. Thin, light, low wind load, low visibility. The cheapest option. Suits short portable fences and rotational grazing.
- Polyrope. Thicker, more visible, more conductors, more mechanical strength. Suits semi-permanent horse and cattle fences.
- Polytape. Wide, very visible. Higher wind load. The most common for horses. Conductor count and material vary widely — compare on Ω/m, not on tape width.
Practical specification tips
- Specify by fence length and animal. A short portable sheep fence on 3 conductors is fine; a 5 km permanent cattle fence needs 6+ conductors and possibly a heavier polyrope.
- Ask for the Ω/m number, not just the conductor count. Two 6-strand polyropes from different suppliers can have very different resistance depending on the conductor material and the braid.
- Match the connector hardware. The conductors need to make reliable contact at every join, splice and gate handle. Specify the connector system in the RFQ.
- For long permanent fences, plan for a multi-strand setup. A single 6-conductor polyrope is rarely enough for several kilometers — most permanent fences run multiple parallel lines of polyrope or polytape.