So you have an old tube-type transmitter as a backup. It ran perfectly when you last turned it on two years ago to substitute for your then-ailing solid-state main transmitter. Now you need it again.
Courtesy of www.MikeHolt.com. Based on the 2020 NEC. Article 450 of the National Electrical Code (NEC) opens by saying, “This article covers the installation of all transformers.” Then it lists eight ...
“While most current transformers may look the same on the outside, it’s what’s inside that counts,” according to Meramec Instrument Transformer Co. April 29, 2016 “While most current transformers may ...