1648:
1603:
29:
1614:
1626:
146:
where a lamp or appliance cord passes through a hole or slot of a plug or socket. Its purpose is to "reduce strain on the screw terminal connections—where the metal parts of the wires connect to the socket or plug—and prevent the wires from pulling free."
77:
Note that the colors in this depiction do not match current practises in either the UK or the US, nor is this cable in keeping with current safety standards for electrical installations
1224:
1502:
127:
listed it as an electrician's knot in 1944. He suggested it be used "where rough treatment is expected" and described it as a two-strand
1689:
1533:
294:
1617:
134:
The name may come from its use by fire underwriters, who understood its importance in electrocution and fire prevention.
1496:
1414:
981:
663:
863:
497:
407:
1487:
976:
734:
633:
334:
82:
1366:
1682:
1424:
1184:
452:
1708:
600:
1718:
1482:
1429:
966:
891:
522:
47:
1011:
176:
1376:
1348:
1189:
1026:
833:
502:
1713:
1528:
1492:
1419:
1229:
946:
883:
828:
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772:
747:
658:
482:
412:
287:
128:
113:
57:
1675:
1562:
1477:
1219:
1046:
1041:
752:
623:
477:
359:
237:
1244:
1096:
971:
1630:
212:
1289:
1144:
1071:
991:
653:
648:
555:
492:
487:
437:
387:
101:
1659:
1518:
1381:
1264:
1129:
1119:
931:
911:
808:
698:
643:
570:
565:
545:
540:
442:
377:
372:
109:
1723:
1409:
1338:
1294:
1239:
1086:
1006:
926:
767:
367:
124:
1606:
1391:
1254:
1209:
1174:
1164:
1154:
1124:
941:
668:
638:
628:
382:
280:
1702:
1567:
1401:
1386:
1312:
1269:
1259:
1214:
1199:
1076:
1031:
906:
838:
683:
613:
580:
512:
467:
329:
156:
105:
177:"Underwriter's Knot Strain Reliefs – What is an Underwriter's Knot – Strain Reliefs"
1523:
1358:
1302:
1249:
1194:
1169:
1159:
1149:
1101:
1091:
1051:
1021:
1016:
1001:
961:
921:
916:
858:
848:
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757:
719:
693:
673:
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560:
535:
457:
432:
427:
417:
402:
314:
143:
264:
1647:
1371:
1333:
1179:
1139:
1111:
1081:
1056:
1036:
986:
951:
896:
762:
742:
688:
550:
472:
324:
319:
28:
1538:
1323:
1204:
1066:
1061:
996:
936:
901:
868:
853:
823:
813:
724:
585:
507:
462:
422:
397:
67:
1279:
1234:
956:
843:
618:
608:
575:
447:
392:
1557:
1544:
1343:
873:
530:
1572:
1551:
1134:
798:
708:
1579:
678:
1655:
303:
1450:
347:
276:
1328:
238:"This Is How to Tie an Underwriter's Knot for Lamp Sockets"
272:
1663:
1511:
1470:
1400:
1357:
1311:
1278:
1110:
882:
797:
733:
707:
599:
521:
358:
81:
73:
63:
53:
43:
35:
21:
213:"Underwriter's (Electrician's) Knot | 101Knots"
1683:
288:
8:
1690:
1676:
1467:
1447:
355:
344:
295:
281:
273:
27:
39:Underwriter's knot, Two-strand wall knot
168:
1225:Rigid double splayed loop in the bight
18:
7:
1644:
1642:
1625:
1613:
1662:. You can help Knowledge (XXG) by
265:How to tie an Underwriter's Knot.
14:
1534:International Guild of Knot Tyers
201:, New York: Doubleday, p. 44
1646:
1624:
1612:
1602:
1601:
142:The knot is typically used as a
16:Knot used in electrical wiring
1:
1415:Overhand knot with draw-loop
197:Ashley, Clifford W. (1944),
1740:
1641:
1299:Running highwayman's hitch
116:when the cable is yanked.
1596:
1466:
1446:
354:
343:
310:
26:
634:Directional figure eight
335:List of knot terminology
199:The Ashley Book of Knots
112:from being pulled from
1658:-related article is a
179:. electrical.about.com
967:Double overhand noose
773:Ghiordes & Senneh
58:wall knot, crown knot
114:electrical terminals
790:(triple crown knot)
659:Figure-of-nine loop
1220:Portuguese bowline
977:Farrimond friction
864:Triple fisherman's
624:Bowline on a bight
498:Triple fisherman's
478:Simple Simon under
453:One-sided overhand
408:Double fisherman's
98:underwriter's knot
22:Underwriter's knot
1671:
1670:
1639:
1638:
1592:
1591:
1588:
1587:
1442:
1441:
1438:
1437:
1145:Carrick bend loop
654:Figure-eight loop
556:Ground-line hitch
102:electrical wiring
94:
93:
1731:
1692:
1685:
1678:
1650:
1643:
1629:
1628:
1627:
1616:
1615:
1605:
1604:
1519:Chinese knotting
1488:Decorative knots
1468:
1448:
1367:Ashley's stopper
1265:Yosemite bowline
1130:Bale sling hitch
699:Yosemite bowline
629:Alpine butterfly
383:Alpine butterfly
373:Albright special
356:
345:
297:
290:
283:
274:
252:
251:
249:
248:
234:
228:
227:
225:
224:
217:www.101knots.com
209:
203:
202:
194:
188:
187:
185:
184:
173:
31:
19:
1739:
1738:
1734:
1733:
1732:
1730:
1729:
1728:
1699:
1698:
1697:
1696:
1640:
1635:
1623:
1584:
1507:
1462:
1461:
1434:
1396:
1377:Double overhand
1353:
1316:
1307:
1295:Running bowline
1281:
1274:
1240:Spanish bowline
1190:Friendship knot
1185:Fireman's chair
1106:
1027:Improved clinch
892:Adjustable grip
878:
834:Improved clinch
800:
793:
729:
712:
703:
595:
517:
350:
339:
306:
301:
267:Animated Knots.
261:
256:
255:
246:
244:
236:
235:
231:
222:
220:
219:. 12 March 2019
211:
210:
206:
196:
195:
191:
182:
180:
175:
174:
170:
165:
153:
140:
125:Clifford Ashley
122:
17:
12:
11:
5:
1737:
1735:
1727:
1726:
1721:
1716:
1711:
1701:
1700:
1695:
1694:
1687:
1680:
1672:
1669:
1668:
1651:
1637:
1636:
1634:
1633:
1620:
1609:
1597:
1594:
1593:
1590:
1589:
1586:
1585:
1583:
1582:
1577:
1576:
1575:
1570:
1565:
1555:
1548:
1541:
1536:
1531:
1526:
1521:
1515:
1513:
1512:Related topics
1509:
1508:
1506:
1505:
1500:
1490:
1485:
1480:
1474:
1472:
1471:Lists of knots
1464:
1463:
1460:
1459:
1458:Related topics
1456:
1455:Lists of knots
1452:
1451:
1444:
1443:
1440:
1439:
1436:
1435:
1433:
1432:
1427:
1422:
1417:
1412:
1406:
1404:
1398:
1397:
1395:
1394:
1389:
1384:
1379:
1374:
1369:
1363:
1361:
1355:
1354:
1352:
1351:
1346:
1341:
1336:
1331:
1326:
1320:
1318:
1309:
1308:
1306:
1305:
1300:
1297:
1292:
1286:
1284:
1276:
1275:
1273:
1272:
1267:
1262:
1257:
1255:Triple bowline
1252:
1247:
1242:
1237:
1232:
1230:Slippery eight
1227:
1222:
1217:
1212:
1207:
1202:
1197:
1192:
1187:
1182:
1177:
1175:Eskimo bowline
1172:
1167:
1165:Double bowline
1162:
1157:
1155:Cowboy bowline
1152:
1147:
1142:
1137:
1132:
1127:
1125:Artillery loop
1122:
1116:
1114:
1108:
1107:
1105:
1104:
1099:
1094:
1089:
1084:
1079:
1074:
1069:
1064:
1059:
1054:
1049:
1044:
1039:
1034:
1029:
1024:
1019:
1014:
1009:
1004:
999:
994:
989:
984:
982:Friction hitch
979:
974:
969:
964:
959:
954:
949:
944:
939:
934:
929:
924:
919:
914:
909:
904:
899:
894:
888:
886:
880:
879:
877:
876:
871:
866:
861:
856:
851:
846:
841:
836:
831:
826:
821:
816:
811:
805:
803:
795:
794:
792:
791:
788:Wall and crown
785:
780:
778:Matthew Walker
775:
770:
765:
760:
755:
750:
748:Chinese button
745:
739:
737:
731:
730:
728:
727:
722:
716:
714:
705:
704:
702:
701:
696:
691:
686:
681:
676:
671:
666:
664:Friction hitch
661:
656:
651:
646:
641:
639:Double bowline
636:
631:
626:
621:
616:
611:
605:
603:
597:
596:
594:
593:
588:
583:
578:
573:
568:
563:
558:
553:
548:
543:
538:
533:
527:
525:
519:
518:
516:
515:
510:
505:
500:
495:
493:Surgeon's loop
490:
485:
483:Single carrick
480:
475:
470:
465:
460:
455:
450:
445:
440:
435:
430:
425:
420:
415:
410:
405:
400:
395:
390:
385:
380:
375:
370:
364:
362:
352:
351:
348:
341:
340:
338:
337:
332:
327:
322:
317:
311:
308:
307:
302:
300:
299:
292:
285:
277:
271:
270:
260:
259:External links
257:
254:
253:
229:
204:
189:
167:
166:
164:
161:
160:
159:
152:
149:
139:
136:
121:
118:
92:
91:
85:
79:
78:
75:
71:
70:
65:
61:
60:
55:
51:
50:
45:
41:
40:
37:
33:
32:
24:
23:
15:
13:
10:
9:
6:
4:
3:
2:
1736:
1725:
1722:
1720:
1717:
1715:
1712:
1710:
1709:Stopper knots
1707:
1706:
1704:
1693:
1688:
1686:
1681:
1679:
1674:
1673:
1667:
1665:
1661:
1657:
1652:
1649:
1645:
1632:
1621:
1619:
1610:
1608:
1599:
1598:
1595:
1581:
1578:
1574:
1571:
1569:
1566:
1564:
1561:
1560:
1559:
1556:
1554:
1553:
1549:
1547:
1546:
1542:
1540:
1537:
1535:
1532:
1530:
1527:
1525:
1522:
1520:
1517:
1516:
1514:
1510:
1504:
1501:
1498:
1494:
1491:
1489:
1486:
1484:
1481:
1479:
1476:
1475:
1473:
1469:
1465:
1457:
1454:
1453:
1449:
1445:
1431:
1428:
1426:
1423:
1421:
1418:
1416:
1413:
1411:
1408:
1407:
1405:
1403:
1399:
1393:
1390:
1388:
1385:
1383:
1382:Monkey's fist
1380:
1378:
1375:
1373:
1370:
1368:
1365:
1364:
1362:
1360:
1356:
1350:
1349:Western Union
1347:
1345:
1342:
1340:
1337:
1335:
1332:
1330:
1327:
1325:
1322:
1321:
1319:
1314:
1310:
1304:
1301:
1298:
1296:
1293:
1291:
1288:
1287:
1285:
1283:
1277:
1271:
1268:
1266:
1263:
1261:
1260:Water bowline
1258:
1256:
1253:
1251:
1248:
1246:
1243:
1241:
1238:
1236:
1233:
1231:
1228:
1226:
1223:
1221:
1218:
1216:
1213:
1211:
1208:
1206:
1203:
1201:
1198:
1196:
1193:
1191:
1188:
1186:
1183:
1181:
1178:
1176:
1173:
1171:
1168:
1166:
1163:
1161:
1158:
1156:
1153:
1151:
1148:
1146:
1143:
1141:
1138:
1136:
1133:
1131:
1128:
1126:
1123:
1121:
1118:
1117:
1115:
1113:
1109:
1103:
1100:
1098:
1095:
1093:
1090:
1088:
1085:
1083:
1080:
1078:
1075:
1073:
1070:
1068:
1065:
1063:
1060:
1058:
1055:
1053:
1050:
1048:
1045:
1043:
1040:
1038:
1035:
1033:
1030:
1028:
1025:
1023:
1020:
1018:
1015:
1013:
1010:
1008:
1005:
1003:
1000:
998:
995:
993:
990:
988:
985:
983:
980:
978:
975:
973:
970:
968:
965:
963:
960:
958:
955:
953:
950:
948:
945:
943:
940:
938:
935:
933:
930:
928:
925:
923:
920:
918:
915:
913:
910:
908:
905:
903:
900:
898:
895:
893:
890:
889:
887:
885:
881:
875:
872:
870:
867:
865:
862:
860:
857:
855:
852:
850:
847:
845:
842:
840:
837:
835:
832:
830:
827:
825:
822:
820:
817:
815:
812:
810:
809:Angler's loop
807:
806:
804:
802:
799:Fishing
796:
789:
786:
784:
781:
779:
776:
774:
771:
769:
766:
764:
761:
759:
756:
754:
753:Celtic button
751:
749:
746:
744:
741:
740:
738:
736:
732:
726:
723:
721:
718:
717:
715:
710:
706:
700:
697:
695:
692:
690:
687:
685:
684:Overhand loop
682:
680:
677:
675:
672:
670:
667:
665:
662:
660:
657:
655:
652:
650:
647:
645:
644:Farmer's loop
642:
640:
637:
635:
632:
630:
627:
625:
622:
620:
617:
615:
612:
610:
607:
606:
604:
602:
598:
592:
589:
587:
584:
582:
579:
577:
574:
572:
569:
567:
564:
562:
559:
557:
554:
552:
549:
547:
544:
542:
539:
537:
534:
532:
529:
528:
526:
524:
520:
514:
511:
509:
506:
504:
501:
499:
496:
494:
491:
489:
486:
484:
481:
479:
476:
474:
471:
469:
466:
464:
461:
459:
456:
454:
451:
449:
446:
444:
441:
439:
436:
434:
431:
429:
426:
424:
421:
419:
416:
414:
411:
409:
406:
404:
401:
399:
396:
394:
391:
389:
386:
384:
381:
379:
376:
374:
371:
369:
366:
365:
363:
361:
357:
353:
346:
342:
336:
333:
331:
330:List of knots
328:
326:
323:
321:
318:
316:
313:
312:
309:
305:
298:
293:
291:
286:
284:
279:
278:
275:
269:
268:
263:
262:
258:
243:
239:
233:
230:
218:
214:
208:
205:
200:
193:
190:
178:
172:
169:
162:
158:
157:List of knots
155:
154:
150:
148:
145:
137:
135:
132:
130:
126:
119:
117:
115:
111:
108:to prevent a
107:
106:strain relief
103:
99:
89:
86:
84:
80:
76:
72:
69:
66:
62:
59:
56:
52:
49:
46:
42:
38:
34:
30:
25:
20:
1719:Double knots
1664:expanding it
1653:
1550:
1543:
1503:Mathematical
1430:West Country
1195:Halter hitch
1170:Dropper loop
1047:Marlinespike
1042:Lobster buoy
1017:Hitching tie
1012:Highwayman's
819:Bimini twist
720:Chain sinnet
694:Trident loop
674:Munter hitch
649:Figure-eight
536:Bottle sling
503:True lover's
438:Heaving line
388:Basket weave
266:
245:. Retrieved
241:
232:
221:. Retrieved
216:
207:
198:
192:
181:. Retrieved
171:
144:stopper knot
141:
133:
123:
97:
95:
87:
1618:WikiProject
1425:Sailmaker's
1334:Marlinspike
992:Ground-line
897:Anchor bend
829:Fisherman's
783:Turk's head
743:Carrick mat
546:Corned beef
541:Constrictor
413:Fisherman's
100:is used in
64:Typical use
1714:Knot stubs
1703:Categories
1420:Portuguese
1245:Tom fool's
972:Falconer's
912:Bale sling
768:Friendship
735:Decorative
725:Sheepshank
368:Adjustable
247:2020-03-31
242:The Spruce
223:2020-03-31
183:2014-01-26
163:References
68:electrical
1392:Stevedore
1290:Hangman's
1210:Jury mast
1097:Trucker's
1087:Taut-line
1007:Highpoint
947:Cat's paw
927:Blackwall
801:(angling)
669:Klemheist
609:Autoblock
488:Surgeon's
129:wall knot
1607:Category
1568:Splicing
1558:Ropework
1545:Mizuhiki
1497:friction
1483:Bindings
1402:Whipping
1387:Overhand
1339:Rat-tail
1317:splicing
1270:Zeppelin
1215:Overhand
1200:Handcuff
1120:Angler's
1072:Sailor's
942:Buntline
907:Bachmann
839:Knotless
614:Bachmann
601:Climbing
581:Strangle
571:Packer's
566:Miller's
513:Zeppelin
468:Shoelace
443:Hunter's
378:Ashley's
151:See also
138:Function
44:Category
1631:Commons
1573:Seizing
1563:Lashing
1552:Norigae
1539:Macramé
1529:History
1524:Density
1495: (
1493:Hitches
1359:Stopper
1313:Splices
1303:Tarbuck
1280:Running
1250:Trident
1160:Diamond
1150:Cossack
1135:Bowline
1077:Snuggle
1032:Killick
932:Blake's
884:Hitches
859:Trilene
849:Palomar
758:Diamond
591:Transom
561:Jamming
523:Binding
458:Racking
433:Harness
428:Halyard
418:Flemish
403:Carrick
349:By type
120:History
54:Related
48:Stopper
1724:Cables
1622:
1611:
1600:
1580:Sennit
1410:Common
1372:Button
1282:(slip)
1180:Fiador
1140:Bumper
1102:Tumble
1092:Timber
1052:Munter
1022:Icicle
1002:Halter
962:Distel
922:Becket
917:Barrel
763:Fiador
713:shanks
689:Prusik
551:Granny
473:Shroud
90:, #775
74:Caveat
1654:This
1478:Bends
1315:&
1205:Honda
1082:Swing
1057:Ossel
1037:Knute
987:Garda
952:Clove
869:Turle
854:Snell
824:Blood
814:Arbor
711:&
709:Coils
679:Noose
586:Thief
508:Water
463:Sheet
423:Grief
398:Blood
360:Bends
315:Bight
304:Knots
110:cable
36:Names
1660:stub
1656:knot
1235:Span
1112:Loop
1067:Pipe
1062:Pile
997:Half
937:Boom
902:Axle
844:Nail
619:Beer
576:Reef
448:Nail
393:Beer
325:Turn
320:Loop
96:The
88:#237
83:ABoK
1329:Fid
1324:Eye
957:Cow
874:Uni
531:Boa
104:as
1705::
240:.
215:.
131:.
1691:e
1684:t
1677:v
1666:.
1499:)
1344:T
296:e
289:t
282:v
250:.
226:.
186:.
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