Simple Apparatus

An electrical component or combination of components of simple construction with well-defined electrical parameters that does not generate more than 1.5 volts, 100 mA, and 25 mW, or a passive component that does not dissipate more than 1.3 watts and is compatible with the intrinsic safety of the circuit in which it is used.

Informational Note: The following apparatus are examples of simple apparatus;
(1) Passive components; For example, switches, junction boxes, resistance temperature devices, and simple semi-conductor devices such as LEDs.
(2) Sources of stored energy consisting of single components in simple circuits with well-defined parameters; For example, capacitors or inductors, whose values are considered when determining the overall safety of the system.
(3) Sources of generated energy; For eample, thermocouples and photocells, that do not generate more than 1.5 volts, 100 mA, and 25 mW.