NEC Class 2 Approval for Murrelektronik’s MICO

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NEC Class 2 Approval for Murrelektronik’s MICO Murrelektronik’s MICO protective modules for UL508A control cabinets are a proven option for intelligent power distribution and efficient branch circuit’s protection. Eight different MICO modules are now NEC Class 2 approved, so you can efficiently design your power distribution scheme.

Class 2 Circuits are circuits with limited energy and a maximum power of 100VA. According to the NEC & UL definition, class 2 circuits limit the risk of electrical fires and electric shocks due to their limited energy. Therefore, according to UL508A standard (for control cabinets), any component used and attached devices on the branch circuit in a Class 2 circuit do not require investigation.

So far, an individual NEC Class 2-approved power supply was used to create a class 2 circuit and it required a lot of space. This method was not cost effective and caused a lot of wiring and planning effort.

With Murrelektronik’s MICO NEC Class 2-approved module, it is now possible to design NEC Class 2 circuits even faster, in a more compact and cost-effective way. All you need is a standard power supply unit (that does not necessarily has to be NEC Class 2 approved) combined with MICO to design two, four or eight separate load circuits with limited energy in a simple way. By connecting several MICO modules with the integrated bridging system, the number of channels can be increased up to a total current of 40A. Components attached to the MICO’s marked NEC Class 2 outputs devices no longer need UL approval.

MICO’s proven functions like channel-specific switch-off in case of overload, visual warning notice, storing errors and the cascading start of the current paths provide additional benefits and enable using a smaller power supply and limit the operators need to enter the control cabinet.

Please visit for more information about the NEC Class 2-approved MICO protective modules for UL508A control cabinets.

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