If the power source is a listed Class 2 transformer or listed Class 2 power supply — or it’s in listed equipment marked to identify the Class 2 power source — you’ve got a Class 2 circuit between the ...

Article 725 provides the requirements for Class 2 circuits in Part III. The definitions for Class 2 circuits can be found in Art. 100. In the November 2020 issue, we discussed the general requirements ...

Two transformers - models 15951 and 15952 - can be used in many industrial control systems. In addition to fire and burglar alarms, the transformers are ideal for intercom systems, paging systems, ...

A line of Class 2 control transformers with multitap primary windings is designed for use in industrial and commercial applications. The transformers are precision layer wound for longer service life.