Every electric fence has joints — where a reel runs out, where a line turns a corner, where a gate handle meets the conductor. And every joint is a place where voltage quietly leaks away. Corroded splices, loose knots and conductors that barely touch are the reason a fence reads 4,000V at the energizer and 800V at the far end.
The good news: joining fence line correctly is a 5-minute skill that pays off for the life of the fence. Here is how to splice, knot and connect each type of conductor without turning your fence into a voltage sieve.
The Golden Rules of Every Joint
Before the specifics, four rules apply to every splice on every fence:
- Metal must touch metal. The current travels in the conductor's metal strands — a knot that only grips the plastic jacket carries almost nothing.
- No bare wire touching anything but the joint. A splice that touches a post, a gate frame or the ground is a short, not a joint.
- Corrosion is the enemy. Bare twisted steel left in weather corrodes and adds resistance every month. Protect splices or use purpose-built connectors.
- Tension after the joint, not through it. The knot or connector should not be the load-bearing point of the line — pull tension on the line itself, with the joint left slack enough not to strain apart.
Joining Steel Wire (the Standard Fence Splice)
Steel wire (galvanized or high-tensile) is joined with a figure-eight knot — the classic fence splice:
- Cross the two wire ends, then wrap each end around the other wire to form two loops — one on each side — shaping a figure eight.
- Pull the loops tight with pliers, then wrap each tail tightly around its own standing wire for 2–3 turns.
- Trim the tails short and pinch them flat against the wire so nothing snags animals or clothing.
For high-tensile wire, use purpose-made wire splices (compression sleeves or clamp connectors rated for HT) — HT wire is too springy for a reliable knot and the tension is too high for twisted joints.
Joining Polywire: Knot It Right
Polywire is braided plastic with thin steel strands woven through it — which means a simple overhand knot can work if the strands touch. The reliable method:
- Use a figure-eight knot, the same as steel — it keeps the wire strands in contact through the knot.
- Pull it very tight. A loose polywire knot is a dead spot.
- Where polywire is under real tension (permanent lines), back the knot with a purpose-made polywire connector or a crimp sleeve designed for the strand count — cheaper than losing the fence at 2 a.m.
Joining Polytape and Polyrope
Wide polytape and round polyrope need a joint that keeps the whole width conducting — a skinny knot wastes half the tape's metal:
- Tape-to-tape: overlap the two ends by 4–6 inches, fold each end over the other, and secure with a tape connector (the plastic buckle-style joiners sold for exactly this) — or sew/lace the overlap with UV-resistant thread through both layers so the strands interlock.
- Tape to wire: use a proper tape-to-wire connector or an insulated clamp; never just hook tape metal around a wire end and hope.
- Rope to rope: splice with a long taper — unbraid 3–4 inches of each end, interleave the strands, and re-braid or bind tightly. This keeps current flowing strand-to-strand along the splice.
Knots are acceptable for temporary tape fences; permanent horse fences deserve connectors, because a tape knot that corrodes or slips is a fence a horse will learn to cross.
Connecting Different Conductors (and Gates)
When you need a temporary connection — joining tape to wire for a gate span, or jumping across a gate — use jumper leads with crocodile clips. LIFEALL jumper leads are built for exactly this: clip to the live line, run across the opening, and clip to the conductor on the other side. No cutting, no knots, and the connection is easy to check and clean.
Why Your Splices Are the First Thing to Check When Voltage Drops
When a fence reads low or an animal pushes through, the instinct is to blame the energizer. Do this first instead:
- Walk the line and inspect every joint — corrosion, loose knots and rusted connectors are the #1 cause of "fence got weak" complaints.
- Test at both ends and at each major splice with a voltage tester. Voltage that is fine at the energizer but dead at the far end means the problem is in the line — and the joints are where to look first.
- Re-do any splice that is corroded, and treat new joints with a dab of corrosion inhibitor or keep them in a dry position where possible.
A Fence Is Only as Good as Its Worst Joint
Good splices are invisible — you make them once and forget them for years. Bad splices are the hidden tax on every underperforming fence: voltage you paid for, leaked into the ground a joint at a time.
Learn the knot, keep the connectors clean, and carry a set of jumper leads for gates and repairs. Then match that careful work with an energizer that shows real fence voltage on an LCD screen — the LIFEALL range turns "is the fence working?" into a glance at the display, every time.