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, ...

The SURVIVOR family of Inherently Limited Class 2 transformers offers models ranging from 30 VA to an industry-largest 100VA. The SURVIVOR family of Inherently Limited Class 2 transformers offers ...

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 ...

In last month's “Code Basics” article, starting on page 56 of the September issue, we spent most of our time discussing Class 1 circuits. Now, it's time to switch gears and focus on Class 2 and 3.