Follow animatedknots on Twitter
Animated Knots by Grog


Better to know a knot and not need it, than need a knot and not know it.

Underwriter's Knot (Electrician's Knot)

Household Index Household Usage

Necktie, Four-in-Hand Necktie, Pratt (Shelby) Necktie, Half Windsor Necktie, Windsor Necktie, Bow Tie Shoelace Bow ShoeLace, Fieggen Child's Swing Tying a Package Butcher's Knot Drapery (Curtain) Tie Back Underwriter's Knot Square (Reef) Sheet Bend Figure 8 Knot Bowline Round Turn & Hitches Trucker's Hitch Constrictor (Twisting) Double O'hand Stopper Barrel Hitch Clove Hitch (End)

Knot Terminology Knot & Rope Safety Rope Properties Contact About Facebook
Use the Arrow Keys or hover over the Buttons above. View Video

Underwriter's (Electrician's) Knot Tying

Form a loop using the first wire. With the second wire, form a loop around the first and pass the tail through its loop. Attach the wires to their terminals. Strain on the cable is now taken by the knot.

Underwriter's (Electrician's) Knot Details

Origin: This knot was described by Ashley as a Wall Knot of two strands which he recommended for electricians expecting rough treatment (ABOK # 237, p 44.) It is known as the Underwriter's Knot – presumably because fire underwriters know that the strain relief reduces the risk of fires and electrocution.

Tying it: The two strands wrap around each so that each strand exits the knot away from the standing end. This is the same technique employed when tying a Wall Knot.

Strain Relief: When finished and installed, the knot should be snug against the housing and both terminal leads should have a little slack. Then, strain on the line is taken by the knot and does not affect the connections.

Disclaimer: Any activity that involves ropes is potentially hazardous. Lives may be at risk - possibly your own. Considerable attention and effort have been made to ensure that these descriptions are accurate. However, many critical factors cannot be controlled, including: the choice of materials; the age, size, and condition of ropes; and the accuracy with which these descriptions have been followed. No responsibility is accepted for incidents arising from the use of this material.

Copyright © 2007 - 2015
All Rights Reserved Grog LLC
    Copyright and Trademark    
Version 4.0.1. Nov 24, 2014

iPad App – New

ipad More Options
Full Screen
Features ++

Android App

Android PhoneUpdated Version
Move to SD Card
Added Sections

iPhone App

iPhone Updated Version
Added Sections
More Features

Get the Program

Download a Copy
for your own computer.