snap-on ammeter

snap-on ammeter

[′snap¦ȯn ′am‚ēd·ər]
(electricity)
An ac ammeter having a magnetic core in the form of hinged jaws that can be snapped around the current-carrying wire. Also known as clamp-on ammeter.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.